Preface to the Second Edition |
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xv | |
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1 | (20) |
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Categorical Response Data |
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1 | (2) |
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Response/Explanatory Variable Distinction |
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2 | (1) |
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Nominal/Ordinal Scale Distinction |
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2 | (1) |
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Organization of this Book |
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3 | (1) |
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Probability Distributions for Categorical Data |
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3 | (3) |
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4 | (1) |
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5 | (1) |
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Statistical Inference for a Proportion |
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6 | (5) |
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Likelihood Function and Maximum Likelihood Estimation |
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6 | (2) |
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Significance Test About a Binomial Proportion |
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8 | (1) |
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Survey Results on Legalizing Abortion |
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8 | (1) |
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Confidence Intervals for a Binomial Proportion |
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9 | (2) |
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More on Statistical Inference for Discrete Data |
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11 | (5) |
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Wald, Likelihood-Ratio, and Score Inference |
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11 | (1) |
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Wald, Score, and Likelihood-Ratio Inference for Binomial Parameter |
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12 | (1) |
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Small-Sample Binomial Inference |
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13 | (1) |
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Small-Sample Discrete Inference is Conservative |
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14 | (1) |
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Inference Based on the Mid P-value |
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15 | (1) |
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16 | (1) |
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16 | (5) |
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21 | (44) |
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Probability Structure for Contingency Tables |
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21 | (4) |
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Joint, Marginal, and Conditional Probabilities |
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22 | (1) |
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22 | (1) |
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Sensitivity and Specificity in Diagnostic Tests |
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23 | (1) |
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24 | (1) |
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Binomial and Multinomial Sampling |
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25 | (1) |
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Comparing Proportions in Two-by-Two Tables |
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25 | (3) |
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Difference of Proportions |
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26 | (1) |
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Aspirin and Heart Attacks |
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26 | (1) |
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27 | (1) |
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28 | (6) |
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Properties of the Odds Ratio |
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29 | (1) |
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Odds Ratio for Aspirin Use and heart Attacks |
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30 | (1) |
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Inference for Odds Ratios and Log Odds Ratios |
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30 | (2) |
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Relationship Between Odds Ratio and Relative Risk |
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32 | (1) |
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The Odds Ratio Applies in Case-Control Studies |
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32 | (2) |
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Types of Observational Studies |
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34 | (1) |
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Chi-Squared Tests of Independence |
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34 | (7) |
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Pearson Statistic and the Chi-Squared Distribution |
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35 | (1) |
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Likelihood-Ratio Statistic |
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36 | (1) |
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36 | (1) |
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Gender Gap in Political Affiliation |
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37 | (1) |
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Residuals for Cells in a Contingency Table |
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38 | (1) |
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39 | (1) |
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Comments About Chi-Squared Tests |
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40 | (1) |
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Testing Independence for Ordinal Data |
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41 | (4) |
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Linear Trend Alternative to Independence |
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41 | (1) |
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Alcohol Use and Infant Malformation |
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42 | (1) |
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Extra Power with Ordinal Tests |
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43 | (1) |
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43 | (1) |
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Trend Tests for I * 2 and 2 * J Tables |
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44 | (1) |
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45 | (1) |
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Exact Inference for Small Samples |
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45 | (4) |
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Fisher's Exact Test for 2 * 2 Tables |
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45 | (1) |
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46 | (1) |
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P-Values and Conservatism for Actual P(Type I Error) |
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47 | (1) |
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Small-Sample Confidence Interval for Odds Ratio |
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48 | (1) |
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Association in Three-Way Tables |
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49 | (6) |
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49 | (1) |
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Conditional Versus Marginal Associations: Death Penalty Example |
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49 | (2) |
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51 | (1) |
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Conditional and Marginal Odds Ratios |
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52 | (1) |
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Conditional Independence Versus Marginal Independence |
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53 | (1) |
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54 | (1) |
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55 | (10) |
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Generalized Linear Models |
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65 | (34) |
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Components of a Generalized Linear Model |
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66 | (2) |
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66 | (1) |
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66 | (1) |
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66 | (1) |
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67 | (1) |
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Generalized Linear Models for Binary Data |
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68 | (6) |
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68 | (1) |
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Snoring and Heart Disease |
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69 | (1) |
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Logistic Regression Model |
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70 | (2) |
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72 | (1) |
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Binary Regression and Cumulative Distribution Functions |
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72 | (2) |
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Generalized Linear Models for Count Data |
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74 | (10) |
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75 | (1) |
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Female Horseshoe Crabs and their Satellites |
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75 | (5) |
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Overdispersion: Greater Variability than Expected |
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80 | (1) |
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Negative Binomial Regression |
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81 | (1) |
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Count Regression for Rate Data |
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82 | (1) |
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British Train Accidents over Time |
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83 | (1) |
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Statistical Inference and Model Checking |
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84 | (4) |
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Inference about Model Parameters |
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84 | (1) |
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Snoring and Heart Disease Revisited |
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85 | (1) |
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85 | (1) |
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Model Comparison Using the Deviance |
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86 | (1) |
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Residuals Comparing Observations to the Model Fit |
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87 | (1) |
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Fitting Generalized Linear Models |
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88 | (2) |
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The Newton-Raphson Algorithm Fits GLMs |
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88 | (1) |
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Wald, Likelihood-Ratio, and Score Inference Use the Likelihood Function |
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89 | (1) |
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90 | (1) |
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90 | (9) |
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99 | (38) |
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Interpreting the Logistic Regression Model |
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99 | (7) |
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Linear Approximation Interpretations |
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100 | (1) |
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Horseshoe Crabs: Viewing and Smoothing a Binary Outcome |
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101 | (1) |
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Horseshoe Crabs: Interpreting the Logistic Regression Fit |
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101 | (3) |
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Odds Ratio Interpretation |
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104 | (1) |
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Logistic Regression with Retrospective Studies |
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105 | (1) |
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Normally Distributed X Implies Logistic Regression for Y |
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105 | (1) |
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Inference for Logistic Regression |
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106 | (4) |
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Binary Data can be Grouped or Ungrouped |
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106 | (1) |
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Confidence Intervals for Effects |
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106 | (1) |
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107 | (1) |
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Confidence Intervals for Probabilities |
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108 | (1) |
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Why Use a Model to Estimate Probabilities? |
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108 | (1) |
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Confidence Intervals for Probabilities: Details |
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108 | (1) |
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Standard Errors of Model Parameter Estimates |
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109 | (1) |
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Logistic Regression with Categorical Predictors |
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110 | (5) |
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Indicator Variables Represent Categories of Predictors |
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110 | (1) |
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111 | (2) |
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ANOVA-Type Model Representation of Factors |
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113 | (1) |
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The Cochran-Mantel-Haenszel Test for 2 * 2 * K Contingency Tables |
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114 | (1) |
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Testing the Homogeneity of Odds Ratios |
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115 | (1) |
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Multiple Logistic Regression |
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115 | (5) |
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Horseshoe Crabs with Color and Width Predictors |
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116 | (2) |
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Model Comparison to Check Whether a Term is Needed |
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118 | (1) |
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Quantitative Treatment of Ordinal Predictor |
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118 | (1) |
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119 | (1) |
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Summarizing Effects in Logistic Regression |
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120 | (1) |
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Probability-Based Interpretations |
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120 | (1) |
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Standardized Interpretations |
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121 | (1) |
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121 | (16) |
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Building and Applying Logistic Regression Models |
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137 | (36) |
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Strategies in Model Selection |
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137 | (7) |
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How Many Predictors Can You Use? |
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138 | (1) |
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Horseshoe Carbs Revisited |
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138 | (1) |
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Stepwise Variable Selection Algorithms |
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139 | (1) |
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Backward Elimination for Horseshoe Crabs |
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140 | (1) |
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AIC, Model Selection, and the ``Correct'' Model |
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141 | (1) |
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Summarizing Predictive Power: Classification Tables |
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142 | (1) |
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Summarizing Predictive Power: ROC Curves |
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143 | (1) |
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Summarizing Predictive Power: A Correlation |
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144 | (1) |
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144 | (8) |
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Likelihood-Ratio Model Comparison Tests |
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144 | (1) |
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Goodness of Fit and the Deviance |
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145 | (1) |
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Checking Fit: Grouped Data, Ungrouped Data, and Continuous Predictors |
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146 | (1) |
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Residuals for Logit Models |
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147 | (2) |
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Graduate Admissions at University of Florida |
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149 | (1) |
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Influence Diagnostics for Logistic Regression |
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150 | (1) |
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Heart Disease and Blood Pressure |
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151 | (1) |
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152 | (5) |
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Infinite Effect Estimate: Quantitative Predictor |
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152 | (1) |
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Infinite Effect Estimate: Categorical Predictors |
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153 | (1) |
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Clinical Trial with Sparse Data |
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154 | (2) |
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Effect of Small Samples on X2 and G2 Tests |
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156 | (1) |
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Conditional Logistic Regression and Exact Inference |
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157 | (3) |
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Conditional Maximum Likelihood Inference |
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157 | (1) |
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Small-Sample Tests for Contingency Tables |
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158 | (1) |
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159 | (1) |
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Small-Sample Confidence Intervals for Logistic Parameters and Odds Ratios |
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159 | (1) |
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Limitations of Small-Sample Exact Methods |
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160 | (1) |
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Sample Size and Power for Logistic Regression |
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160 | (3) |
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Sample Size for Comparing Two Proportions |
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161 | (1) |
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Sample Size in Logistic Regression |
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161 | (1) |
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Sample Size in Multiple Logistic Regression |
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162 | (1) |
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163 | (10) |
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Multicategory Logit Models |
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173 | (31) |
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Logit Models for Nominal Responses |
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173 | (7) |
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173 | (1) |
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174 | (2) |
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Estimating Response Probabilities |
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176 | (2) |
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178 | (1) |
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179 | (1) |
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Cumulative Logit Models for Ordinal Responses |
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180 | (9) |
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Cumulative Logit Models with Proportional Odds Property |
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180 | (2) |
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Political Ideology and Party Affiliation |
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182 | (2) |
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Inference about Model Parameters |
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184 | (1) |
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184 | (1) |
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185 | (2) |
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Interpretations Comparing Cumulative Probabilities |
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187 | (1) |
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Latent Variable Motivation |
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187 | (2) |
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Invariance to Choice of Response Categories |
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189 | (1) |
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Paired-Category Ordinal Logits |
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189 | (4) |
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Adjacent-Categories Logits |
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190 | (1) |
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Political Ideology Revisited |
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190 | (1) |
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Continuation-Ratio Logits |
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191 | (1) |
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A Developmental Toxicity Study |
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191 | (1) |
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Overdispersion in Clustered Data |
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192 | (1) |
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Tests of Conditional Independence |
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193 | (3) |
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Job Satisfaction and Income |
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193 | (1) |
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Generalized Cochran-Mantel-Haenszel Tests |
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194 | (1) |
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Detecting Nominal-Ordinal Conditional Association |
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195 | (1) |
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Detecting Nominal-Nominal Conditional Association |
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196 | (1) |
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196 | (8) |
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Loglinear Models for Contingency Tables |
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204 | (40) |
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Loglinear Models for Two-Way and Three-Way Tables |
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204 | (8) |
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Loglinear Model of Independence for Two-Way Table |
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205 | (1) |
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Interpretation of Parameters in Independence Model |
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205 | (1) |
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Saturated Model for Two-Way Tables |
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206 | (2) |
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Loglinear Models for Three-Way Tables |
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208 | (1) |
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Two-Factor Parameters Describe Conditional Associations |
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209 | (1) |
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Alcohol, Cigarette, and Marijuana Use |
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209 | (3) |
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Inference for Loglinear Models |
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212 | (7) |
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Chi-Squared Goodness-of-Fit Tests |
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212 | (1) |
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213 | (1) |
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Tests about Conditional Associations |
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214 | (1) |
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Confidence Intervals for Conditional Odds Ratios |
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214 | (1) |
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Loglinear Models for Higher Dimensions |
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215 | (1) |
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Automobile Accidents and Seat Belts |
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215 | (3) |
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218 | (1) |
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Large Samples and Statistical vs Practical Significance |
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218 | (1) |
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The Loglinear-Logistic Connection |
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219 | (4) |
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Using Logistic Models to Interpret Loglinear Models |
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219 | (1) |
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Auto Accident Data Revisited |
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220 | (1) |
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Correspondence Between Loglinear and Logistic Models |
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221 | (1) |
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Strategies in Model Selection |
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221 | (2) |
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Independence Graphs and Collapsibility |
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223 | (5) |
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223 | (1) |
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Collapsibility Conditions for Three-Way Tables |
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224 | (1) |
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Collapsibility and Logistic Models |
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225 | (1) |
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Collapsibility and Independence Graphs for Multiway Tables |
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225 | (1) |
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Model Building for Student Drug Use |
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226 | (2) |
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228 | (1) |
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Modeling Ordinal Associations |
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228 | (4) |
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Linear-by-Linear Association Model |
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229 | (1) |
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230 | (2) |
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Ordinal Tests of Independence |
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232 | (1) |
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232 | (12) |
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244 | (32) |
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Comparing Dependent Proportions |
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245 | (2) |
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McNemar Test Comparing Marginal Proportions |
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245 | (1) |
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Estimating Differences of Proportions |
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246 | (1) |
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Logistic Regression for Matched Pairs |
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247 | (5) |
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Marginal Models for Marginal Proportions |
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247 | (1) |
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Subject-Specific and Population-Averaged Tables |
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248 | (1) |
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Conditional Logistic Regression for Matched-Pairs |
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249 | (1) |
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Logistic Regression for Matched Case-Control Studies |
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250 | (2) |
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Connection between McNemar and Cochran-Mantel-Haenszel Tests |
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252 | (1) |
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Comparing Margins of Square Contingency Tables |
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252 | (4) |
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Marginal Homogeneity and Nominal Classifications |
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253 | (1) |
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Coffee Brand Market Share |
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253 | (1) |
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Marginal Homogeneity and Ordered Categories |
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254 | (1) |
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Example:Recycle or Drive Less to Help Environment? |
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255 | (1) |
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Symmetry and Quasi-Symmetry Models for Square Tables |
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256 | (4) |
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Symmetry as a Logistic Model |
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257 | (1) |
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257 | (1) |
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Coffee Brand Market Share Revisited |
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257 | (1) |
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Testing Marginal Homogeneity Using Symmetry and Quasi-Symmetry |
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258 | (1) |
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An Ordinal Quasi-Symmetry Model |
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258 | (1) |
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259 | (1) |
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Testing Marginal Homogeneity Using Symmetry and Ordinal Quasi-Symmetry |
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259 | (1) |
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Analyzing Rater Agreement |
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260 | (4) |
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Cell Residuals for Independence Model |
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261 | (1) |
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261 | (1) |
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Odds Ratios Summarizing Agreement |
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262 | (1) |
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Quasi-Symmetry and Agreement Modeling |
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263 | (1) |
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Kappa Measure of Agreement |
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264 | (1) |
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Bradley-Terry Model for Paired Preferences |
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264 | (2) |
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265 | (1) |
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Ranking Men Tennis Players |
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265 | (1) |
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266 | (10) |
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Modeling Correlated, Clustered Responses |
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276 | (21) |
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Marginal Models Versus Conditional Models |
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277 | (2) |
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Marginal Models for a Clustered Binary Response |
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277 | (1) |
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Longitudinal Study of Treatments for Depression |
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277 | (2) |
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Conditional Models for a Repeated Response |
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279 | (1) |
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Marginal Modeling: The GEE Approach |
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279 | (6) |
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280 | (1) |
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Generalized Estimating Equation Methodology: Basic Ideas |
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280 | (1) |
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GEE for Binary Data: Depression Study |
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281 | (2) |
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Teratology Overdispersion |
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283 | (1) |
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Limitations of GEE Compared with ML |
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284 | (1) |
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Extending GEE: Multinomial Responses |
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285 | (3) |
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Marginal Modeling of a Clustered Multinomial Response |
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285 | (1) |
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285 | (2) |
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Another Way of Modeling Association with GEE |
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287 | (1) |
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Dealing with Missing Data |
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287 | (1) |
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Transitional Modeling, Given the Past |
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288 | (2) |
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Transitional Models with Explanatory Variables |
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288 | (1) |
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Respiratory Illness and Maternal Smoking |
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288 | (1) |
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Comparisons that Control for Initial Response |
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289 | (1) |
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Transitional Models Relate to Loglinear Models |
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290 | (1) |
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290 | (7) |
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Random Effects: Generalized Linear Mixed Models |
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297 | (28) |
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Random Effects Modeling of Clustered Categorical Data |
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297 | (5) |
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The Generalized Linear Mixed Model |
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298 | (1) |
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A Logistic GLMM for Binary Matched Pairs |
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299 | (1) |
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Sacrifices for the Environment Revisited |
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300 | (1) |
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Differing Effects in Conditional Models and Marginal Models |
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300 | (2) |
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Examples of Random Effects Models for Binary Data |
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302 | (8) |
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Small-Area Estimation of Binomial Probabilities |
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302 | (1) |
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Estimating Basketball Free Throw Success |
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303 | (1) |
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Teratology Overdispersion Revisited |
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304 | (1) |
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Repeated Responses on Similar Survey Items |
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305 | (2) |
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Item Response Models: The Rasch Model |
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307 | (1) |
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Depression Study Revisited |
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307 | (1) |
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Choosing Marginal or Conditional Models |
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308 | (1) |
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Conditional Models: Random Effects Versus Conditional ML |
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309 | (1) |
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Extensions to Multinomial Responses or Multiple Random Effect Terms |
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310 | (3) |
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310 | (1) |
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Bivariate Random Effects and Association Heterogeneity |
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311 | (2) |
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Multilevel (Hierarchical) Models |
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313 | (3) |
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Two-Level Model for Student Advancement |
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314 | (1) |
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315 | (1) |
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Model Fitting and Inference for GLMMS |
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316 | (2) |
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316 | (1) |
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Inference for Model Parameters and Prediction |
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317 | (1) |
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318 | (7) |
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A Historical Tour of Categorical Data Analysis |
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325 | (7) |
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The Pearson-Yule Association Controversy |
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325 | (1) |
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R. A. Fisher's Contributions |
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326 | (2) |
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328 | (1) |
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Multiway Contingency Tables and Loglinear Models |
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329 | (2) |
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331 | (1) |
Appendix A: Software for Categorical Data Analysis |
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332 | (11) |
Appendix B: Chi-Squared Distribution Values |
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343 | (1) |
Bibliography |
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344 | (2) |
Index of Examples |
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346 | (4) |
Subject Index |
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350 | (7) |
Brief Solutions to Some Odd-Numbered Problems |
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357 | (142) |
Acknowledgments |
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xi | |
Using This Book |
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xiii | |
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Basic Concepts in Research and DATA Analysis |
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1 | (20) |
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Introduction: A Common Language for Researchers |
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2 | (1) |
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Steps to Follow When Conducting Research |
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2 | (3) |
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Variables, Values, and Observations |
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5 | (2) |
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7 | (2) |
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Basic Approaches to Research |
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9 | (3) |
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Descriptive versus Inferential Statistical Analysis |
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12 | (1) |
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13 | (6) |
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19 | (2) |
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Introduction to SAS Programs, SAS Logs, and SAS Output |
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21 | (8) |
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Introduction: What is SAS? |
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22 | (1) |
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23 | (5) |
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SAS Customer Support Center |
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28 | (1) |
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28 | (1) |
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28 | (1) |
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29 | (28) |
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Introduction: Inputting Questionnaire Data versus Other Types of Data |
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30 | (1) |
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Entering Data: An Illustrative Example |
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31 | (4) |
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Inputting Data Using the DATALINES Statement |
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35 | (5) |
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40 | (8) |
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Inputting a Correlation or Covariance Matrix |
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48 | (5) |
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Inputting Data Using the INFILE Statement Rather than the DATALINES Statement |
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53 | (1) |
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Controlling the Output Size and Log Pages with the OPTIONS Statement |
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54 | (1) |
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55 | (1) |
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55 | (2) |
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Working with Variables and Observations in SAS Datasets |
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57 | (32) |
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Introduction: Manipulating, Subsetting, Concatenating, and Merging Data |
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58 | (1) |
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Placement of Data Manipulation and Data Subsetting Statements |
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59 | (4) |
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63 | (11) |
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74 | (5) |
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A More Comprehensive Example |
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79 | (1) |
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Concatenating and Merging Datasets |
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80 | (7) |
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87 | (2) |
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Exploring Data with PROC MEANS, PROC FREQ, PROC PRINT, and PROC UNIVARIATE |
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89 | (30) |
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Introduction: Why Perform Simple Descritive Analyses? |
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90 | (1) |
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Example: An Abridged Volunteerism Survey |
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91 | (2) |
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Computing Descriptive Statistics with PROC MEANS |
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93 | (3) |
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Creating Frequency Tables with PROC FREQ |
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96 | (2) |
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Printing Raw Data with PROC PRINT |
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98 | (1) |
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Testing for Normality with PROC UNIVARIATE |
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99 | (19) |
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118 | (1) |
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118 | (1) |
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Measures of Bivariate Association |
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119 | (36) |
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Introduction: Significance Tests versus Measures of Association |
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120 | (1) |
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Choosing the Correct Statistic |
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121 | (4) |
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125 | (15) |
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140 | (2) |
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The Chi-Square Test of Independence |
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142 | (11) |
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153 | (1) |
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Assumptions Underlying the Tests |
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153 | (1) |
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154 | (1) |
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Assessing Scale Reliability with Coefficient Alpha |
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155 | (12) |
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Introduction: The Basics of Scale Reliability |
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156 | (3) |
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159 | (1) |
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Assessing Coefficient Alpha with PROC CORR |
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160 | (5) |
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165 | (1) |
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166 | (1) |
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166 | (1) |
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t Tests: Independent Samples and Paired Samples |
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167 | (42) |
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Introduction: Two Types of t Tests |
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168 | (1) |
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The Independent-Samples t Test |
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169 | (19) |
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The Paired-Samples t Test |
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188 | (19) |
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207 | (1) |
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Assumptions Underlying the t Test |
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207 | (1) |
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208 | (1) |
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One-Way ANOVA with One Between-Subjects Factor |
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209 | (28) |
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Introduction: The Basics of One-Way ANOVA, Between-Subjects Design |
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210 | (4) |
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Example with Significant Differences between Experimental Conditions |
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214 | (13) |
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Example with Nonsignificant Differences between Experimental Conditions |
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227 | (5) |
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Understanding the Meaning of the F Statistic |
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232 | (1) |
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Using the LSMEANS Statement to Analyze Data from Unbalanced Designs |
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233 | (2) |
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235 | (1) |
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Assumptions Underlying One-Way ANOVA with One Between-Subjects Factor |
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235 | (1) |
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235 | (2) |
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Factorial ANOVA with Two Between-Subjects Factors |
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237 | (42) |
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Introduction to Factorial Designs |
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238 | (3) |
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Some Possible Results from a Factorial ANOVA |
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241 | (7) |
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Example with a Nonsignificant Interaction |
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248 | (12) |
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Example with a Significant Interaction |
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260 | (15) |
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Using the LSMEANS Statement to Analyze Data from Unbalanced Designs |
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275 | (3) |
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278 | (1) |
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Assumptions Underlying Factorial ANOVA with Two Between-Subjects Factors |
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278 | (1) |
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Multivariate Analysis of Variance (MANOVA) with One Between-Subjects Factor |
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279 | (20) |
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Introduction: The Basics of Multivariate Analysis of Variance |
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280 | (3) |
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Example with Significant Differences between Experimental Conditions |
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283 | (11) |
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Example with Nonsignificant Differences between Experimental Conditions |
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294 | (2) |
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296 | (1) |
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Assumptions Underlying Multivariate ANOVA with One Between-Subjects Factor |
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296 | (1) |
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297 | (2) |
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One-Way ANOVA with One Repeated-Measures Factor |
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299 | (26) |
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Introduction: What Is a Repeated-Measures Design? |
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300 | (2) |
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Example: Significant Differences in Investment Size Across Time |
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302 | (13) |
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Further Notes on Repeated-Measures Analyses |
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315 | (7) |
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322 | (1) |
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Assumptions Underlying the One-Way ANOVA with One Repeated-Measures Factor |
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322 | (2) |
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324 | (1) |
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Factorlal ANOVA with Repeated-Measures Factors and Between-Subjects Factors |
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325 | (42) |
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Introduction: The Basics of Mixed-Design ANOVA |
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326 | (5) |
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Some Possible Results from a Two-Way Mixed-Design ANOVA |
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331 | (5) |
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Problems with the Mixed-Design ANOVA |
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336 | (1) |
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Example with a Nonsignificant Interaction |
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336 | (13) |
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Example with a Significant Interaction |
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349 | (15) |
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Use of Other Post-Hoc Tests with the Repeated-Measures Variable |
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364 | (1) |
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364 | (1) |
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Assumptions Underlying Factorial ANOVA with Repeated-Measures Factors and Between-Subjects Factors |
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364 | (2) |
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366 | (1) |
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367 | (62) |
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Introduction: Answering Questions with Multiple Regression |
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368 | (5) |
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Background: Predicting a Criterion Variable from Multiple Predictors |
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373 | (8) |
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The Results of a Multiple Regression Analysis |
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381 | (19) |
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Example: A Test of the Investment Model |
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400 | (1) |
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401 | (1) |
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Gathering and Entering Data |
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402 | (4) |
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Computing Bivariate Correlations with PROC CORR |
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406 | (3) |
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Estimating the Full Multiple Regression Equation with PROC REG |
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409 | (6) |
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Computing Uniqueness Indices with PROC REG |
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415 | (8) |
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Summarizing the Results in Tables |
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423 | (1) |
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424 | (1) |
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Formal Description of Results for a Paper |
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425 | (1) |
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Conclusion: Learning More about Multiple Regression |
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426 | (1) |
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Assumptions Underlying Multiple Regression |
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427 | (1) |
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428 | (1) |
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Principal Component Analysis |
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429 | (54) |
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Introduction: The Basics of Principal Component Analysis |
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430 | (8) |
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Example: Analysis of the Prosocial Orientation Inventory |
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438 | (3) |
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441 | (8) |
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Steps in Conducting Principal Component Analysis |
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449 | (19) |
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An Example with Three Retained Components |
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468 | (13) |
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481 | (1) |
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Assumptions Underlying Principal Component Analysis |
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481 | (1) |
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481 | (2) |
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Appendix A Choosing the Correct Statistic |
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483 | (8) |
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Introduction: Thinking about the Number and Scale of Your Variables |
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484 | (2) |
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Guidelines for Choosing the Correct Statistic |
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486 | (4) |
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490 | (1) |
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490 | (1) |
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491 | (4) |
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Assessing Scale Reliability with Coefficient Alpha |
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492 | (1) |
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493 | (1) |
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Principal Component Analysis |
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494 | (1) |
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Appendix C Critical Values of the F Distribution |
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495 | (4) |
Index |
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499 | |