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Kyle C. Longest. Using Stata for Quantitative Analysis
Using Stata® for Quantitative Analysis
Using Stata® for Quantitative Analysis
BRIEF CONTENTS
DETAILED CONTENTS
LIST OF A CLOSER LOOK BOXES
Preface. Motivation and Purpose
About the National Study of Youth and Religion
A Note on Versions
A Note on Notation
References
Acknowledgments
About the Author
Part I Foundations for Working With Stata
1 Getting to Know Stata 15
What You See2
Getting Started With Data Files
Opening and Saving Stata Data Files
Data Browser and Editor
A CLOSER LOOK: STATA DATA FILES ACROSS VERSIONS
A CLOSER LOOK: YOUR FIRST COMMAND
Entering Your Own Data
Using Different Types of Data Files in Stata
A CLOSER LOOK: COMBINING DATA
Appending Data
Merging Data
Types of Variables in Data Files
A CLOSER LOOK: VARIABLE TYPES
Exercises
2 The Essentials
Intuition and Stata Commands
A CLOSER LOOK: COMMANDS VERSUS POINT-AND-CLICK
The Structure of Stata Commands
Command
Variables
if Statements
Options
Executing a Command Using the Command Window
The 5 Essential Commands
tabulate
A CLOSER LOOK: COMMAND SHORTCUTS
summary
generate
replace (if)
A CLOSER LOOK: MATHEMATICAL OPERATORS AND THEIR SYMBOLS
A CLOSER LOOK: THE “DREADED” ERROR MESSAGE
A CLOSER LOOK: LOGICAL OPERATORS AND THEIR SYMBOLS
recode
A CLOSER LOOK: MULTIPLE COMMANDS TO THE SAME ENDS
Nonessential, Everyday Commands
rename
drop/keep (if)
describe
display
set more off
Summary of Commands Used in This Chapter
Exercises
3 Do Files and Data Management
What Is a Do File?
Opening and Saving Do Files
Translation From the Command Window
Getting the Most Out of Do Files
Data Management
Working With Labels
Missing Data
A CLOSER LOOK: WHEN A MISSING CASE MAY NOT BE MISSING
Using String Variables
Saving Results
Summary of Commands Used in This Chapter
Exercises
Part II Quantitative Analysis With Stata
4 Descriptive Statistics
Frequency Distributions
Histograms and Bar Graphs
A CLOSER LOOK: USING COMMANDS TO CREATE GRAPHS
Measures of Central Tendency and Variability
A CLOSER LOOK: STATISTICS AND THEIR CODES FOR USE WITH TABSTAT, STAT (STATNAME)
Box Plots
A CLOSER LOOK: USING HISTOGRAMS TO EXAMINE CENTRAL TENDENCY AND VARIABILITY
Summary of Commands Used in This Chapter
Exercises
5 Relationships Between Nominal and Ordinal Variables
Cross-Tabulations
A CLOSER LOOK: RECODING FOR DIRECTION
A CLOSER LOOK: RECODING AND VALUE LABELS—A SHORTCUT
Chi-Square Test
Measures of Association
Elaboration
A CLOSER LOOK: USING –BYSORT– AS A UNIVERSAL TOOL
Multivariate Bar Graphs
Summary of Commands Used in This Chapter
Exercises
6 Relationships Between Different Measurement Levels
Testing Means
Confidence Intervals
Testing a Specific Value (One-Sample t Test)
Testing the Mean of Two Groups (Independent-Samples t Test)
Testing Proportions
A CLOSER LOOK: TESTS OF MEANS AND PROPORTIONS WITHOUT DATA
Multivariate Means Graphs
Analysis of Variance (ANOVA)
Summary of Commands Used in This Chapter
Exercises
7 Relationships Between Interval-Ratio Variables
Correlation
Scatterplots
Linear Regression
Multiple Linear Regression
A CLOSER LOOK: PREDICTIONS AFTER REGRESSION ANALYSES
Dichotomous (Dummy) Variables and Linear Regression
Beyond Linear Regression
Summary of Commands Used in This Chapter
Exercises
8 Enhancing Your Command Repertoire
Stata Help Files
Ways to Search and Access
Structure and Language
A CLOSER LOOK: HELP FILE CODE WORDS
Advanced Convenience Commands
tab, gen(newvar)
A CLOSER LOOK: USING WILDCARDS
egen
mark and markout
alpha, gen(newvar)
Expanding Stata’s Capabilities
Summary of Commands Used in This Chapter
Exercises
Chapter Exercise Solutions1
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Alphabetical Command Index and Glossary
