Preface | p. ix |
Motivation and Purpose | p. ix |
About the National Study of Youth and Religion | p. x |
A Note on Versions | p. xi |
A Note on Notation | p. xi |
References | p. xii |
Acknowledgments | p. xiii |
Foundations for Working with Stata | p. 1 |
Getting to Know Stata 12 | p. 2 |
What You See | p. 2 |
Getting Started With Data Files | p. 5 |
Opening and Saving Stata Data Files | p. 5 |
Data Browser and Editor | p. 7 |
Entering Your Own Data | p. 10 |
Using Different Types of Data Files in Stata | p. 10 |
Types of Variables in Data Files | p. 13 |
Exercises | p. 16 |
The Essentials | p. 17 |
Intuition and Stata Commands | p. 17 |
The Structure of Stata Commands | p. 19 |
Command | p. 20 |
Variables | p. 20 |
if Statements | p. 20 |
Options | p. 21 |
Executing a Command Using the Command Window | p. 21 |
The 5 Essential Commands | p. 21 |
tabulate | p. 22 |
summary | p. 28 |
generate | p. 29 |
replace (if) | p. 35 |
recode | p. 43 |
Nonessential, Everyday Commands | p. 48 |
rename | p. 48 |
drop/keep (if) | p. 48 |
describe | p. 50 |
display | p. 51 |
set more off | p. 52 |
Summary of Commands Used in This Chapter | p. 52 |
Exercises | p. 54 |
Do Files and Data Management | p. 55 |
What Is a Do File? | p. 56 |
Opening and Saving Do Files | p. 57 |
Translation From the Command Window | p. 58 |
Getting the Most Out of Do Files | p. 66 |
Data Management | p. 69 |
Working With Labels | p. 69 |
Missing Data | p. 74 |
Using String Variables | p. 80 |
Saving Results | p. 83 |
Summary of Commands Used in This Chapter | p. 86 |
Exercises | p. 87 |
Quantitative Analysis with Stata | p. 89 |
Descriptive Statistics | p. 90 |
Frequency Distributions | p. 91 |
Histograms, Bar Graphs, and Pie Charts | p. 97 |
Measures of Central Tendency and Variability | p. 102 |
Box Plots | p. 107 |
Summary of Commands Used in This Chapter | p. 110 |
Exercises | p. 111 |
Relationships Between Nominal and Ordinal Variables | p. 113 |
Cross-Tabulations | p. 113 |
Chi-Square Test | p. 122 |
Measures of Association | p. 124 |
Elaboration | p. 126 |
Multivariate Bar Graphs | p. 130 |
Summary of Commands Used in This Chapter | p. 134 |
Exercises | p. 135 |
Relationships Between Different Measurement Levels | p. 137 |
Testing Means | p. 138 |
Confidence Intervals | p. 139 |
Testing a Specific Value (One-Sample t Test) | p. 140 |
Testing the Mean of Two Groups (Independent-Samples t Test) | p. 141 |
Analysis of Variance (ANOVA) | p. 144 |
Summary of Commands Used in This Chapter | p. 146 |
Exercises | p. 147 |
Relationships Between Interval-Ratio Variables | p. 148 |
Correlation | p. 148 |
Scatterplots | p. 150 |
Linear Regression | p. 156 |
Multiple Linear Regression | p. 160 |
Dichotomous (Dummy) Variables and Linear Regression | p. 162 |
Summary of Commands Used in This Chapter | p. 165 |
Exercises | p. 166 |
Enhancing Your Command Repertoire | p. 167 |
Stata Help Files | p. 167 |
Ways to Search and Access | p. 168 |
Structure and Language | p. 171 |
Advanced Convenience Commands | p. 175 |
tab, gen(newvar) | p. 175 |
egen | p. 178 |
mark and markout | p. 181 |
alpha, gen(newvar) | p. 183 |
Summary of Commands Used in This Chapter | p. 185 |
Exercises | p. 185 |
Appendix: Getting to Know Stata 11 | p. 187 |
Chapter Exercise Solutions | p. 201 |
"How To" Index | p. 221 |
About the Author | p. 225 |
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