Subject index 387. F F ratio F test of unequal variances factor analysis, commonality...337

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1 Subject index Symbols β weights η φ * comment /* and */ comment...79 A acquiring datasets add, label define option... 2 agreement, intraclass correlation alpha reliability ameans command...91 analysis of covariance... see ANCOVA analysis of variance...see ANOVA ANCOVA ANOVA, degrees of freedom equal-variance test one-way repeated-measures two-way ANOVA assumptions ATS at UCLA B bar chart , 304 bar graph of means Bartlett test of equal variances beta weights , 248 limitation binary variables block regression Bonferroni multiple-comparison test , 205 bookstore, Stata bootstrap regression Boston College Stata site box plot , 214 C casewise deletion categorical covariates , categorical predictors, regression cause and effect center command chi-squared table test , 306 chitable command clear command codebook command , 51 52, 131 codebook example coding system coefficient of variation Cohen s d collinearity command structure Command window... 8, 9 confidence interval regression line slope constant continuous covariates conventions used in the book...1 copying, HTML format...18, 83 copying results to word processor...18, 82 correlate command correlation, interpreting limitation multiple comparison...192

2 386 Subject index correlation ratio , 224 count outcome variables Cramér s V, measure of association creating value labels criterion-related validity cross-tabulation D data, long format , 203 wide format , 202 Data Editor , dataset contents dataset, acquisition c10interaction , 287 c11barchart cancer... 10, 11 census chapter6 aspirin chapter13 missing chores create descriptive gss...94, 113, 114 divorce download... xxiii, environ firstsurvey...41 firstsurvey chapter , 80, 86 gss2002 and 2006 chapter gss2002 chapter gss2002 chapter , 155, 157, 165, 178 gss2002 chapter gss2002 chapter gss2002 chapter , 287 gss2002 chapter gss2006 chapter , 130, 141 gss2006 chapter6 10percent gss2006 chapter , 198, 199 gss2006 chapter8 selected dataset, continued gss2006 chapter , 216 gss2006 chapter9 2way gss2006 chapter , 325 gss2006 chapter12 selected intraclass kappa kuder-richardson long nlsy97 chapter , 177 nlsy97 chapter , 306 nlsy97 selected variables , 266 ops partyid...204, 212, 241 positive regsmpl relate... xxiii, 48, 70 relate small...xxiii retest severity spearman , 199 states wide wide degrees of freedom, ANOVA one-sample t test dependent t test dependent variable describe command...10, 43 44, 49 dfbeta command dialog box, describe egen generate...60, 63 graph bar graph pie histogram , 101 logistic margins open prtest recode

3 Subject index 387 dialog box, continued regress...193, 245 scatter Submit vs. OK summarize tab tabi table tabstat tabulate , , 131 ttest , dictionary file...48 difference of means test difference of proportions test do-file, continuation line introduction...6 Do-file Editor download datasets drop command dummy variables E effect size, , 225, 249 η , 224 egen command... 60, 65 67, 319 egen count command egen rowmean command...67, 319 egen rowmiss command...66 egenmore command entering data equal variance, Bartlett test ereturn list command estat vif postestimation command estimates store command exit Stata...18, 41 exponentiation external validity F F ratio F test of unequal variances factor analysis, commonality factor analysis, continued eigenvalue...337, 342 exploratory factor analysis extraction factor score , 346 loading oblique rotation , 344 orthogonal rotation...337, 343 PCF PF postestimation principal component analysis principal-component factor analysis promax rotation scree plot , 342 simple structure varimax factor variables findit command...123, 372 fonts, fixed format, numeric...31 string fre command...96, 98 frequency distributions...95 ftable command G gamma, measure of association generate command geometric mean...91 Goodman and Kruskal s gamma, measure of association GradPlan graph, bar chart...101, 137, 304 box plot collinearity hanging rootogram heteroskedasticity histogram , 251 medians...215

4 388 Subject index graph, continued overlay two-way showing interaction effects pie chart residual versus fitted scattergram graph bar command , 210, 304 graph box command graphics book GUI interface, Edit Preferences...8 H harmonic mean help... 6 video...19 web-based...19 help, listcoef option help label command heteroskedasticity hierarchical regression , histogram histogram command , 251 HTML format I imputation... see multiple imputation increment in R independent variable indicator variables interaction, regression interaction term interactive table intercept interquartile range interval-level variables intraclass correlation...237, 238 J jitter(), scatter option K kappa kappa, weighted kappa with three raters keep command Kendall s tau, measure of association Kruskal Wallis test, ANOVA alternative Kuder Richardson coefficient of reliability kurtosis... 93, 106, L label variable command labeling values labeling variables likelihood-ratio chi-squared test limitations of Stata list, ereturn saved estimates list, return saved statistics list command , 204 list option, nolabel listcoef command listwise deletion log,.smcl extension log files...83 log files and graphs logistic command logistic regression bar chart exponentiation hypothesis tests interpreting odds ratio likelihood-ratio chi-squared test logits McFadden pseudo-r nested nonlinear odds ratio percentage change pseudo-r S-curve vs. OLS regression Wald chi-squared test logit command...292,

5 Subject index 389 logits long format , 160, 203, lrdrop1 command lrtest command M MAR margins command , maximum number of variables MCAR McFadden pseudo-r mean squares measure of association, η , 224 φ odds ratio V median command median, graph box plot menu, open...61 mi estimate command mi ice command mi impute command mi register command mi set command mibeta command misschk command missing, count missing values..27, 52, 63, 73, types...51, 52 misstable command more command...4, 41 multicollinearity multiple comparison, Bonferroni Scheffé Šidák multiple comparison and correlation multiple correlation multiple imputation multiple regression command multiple regression diagnostics multiple regression with interaction term multiple regression, block categorical predictors dummy variables hierarchical indicator variables influential case nested outlier residual weighted data mvdecode command... 52, 63, 159 N naming variables...25 nested regression , nestreg command , NetCourses nolabel, list option nominal-level variables...90 nonlinear nonparametric ANOVA alternatives nonparametric tests Mann Whitney median rank sum normally distributed residuals numlabel command...76, 98 O odds ratio , 294 interpretation percentage change OLS regression vs. logistic regression omega2 command one-sample t test one-way ANOVA oneway option bonferroni scheffe sidak...205

6 390 Subject index open existing dataset Stata-installed dataset...9 optifact command option, add, label define...2 help, listcoef jitter(), scatter percent, listcoef ordinal-level variables...90 outlier P paired t test part correlation pasting,...83 reformatting pasting results to word processor, formatting pcorr command , 270 Pearson s chi-squared percent, listcoef option pie chart...98 plot a confidence interval Poisson regression postestimation command, estat vif predict , 277, 280 test power analysis powerreg command predict postestimation command , 277, 280 predict postregression predictive validity probability tables product term project outline...48 prophecy formula proportions, one-sample test two-sample test prtest command pseudo-r pwcorr command pweights Q qualifier, if with missing values in R R change random sample how to draw random sampling randomization alternative to how to perform ranksum command recode command , 266 recoding ranges regress command , , , regression, block bootstrap categorical predictors dummy variables hierarchical indicator variables influential case nested outlier residual robust weighted data regression diagnostics regression line, plotting regression with interaction term reliability, alpha equivalent forms kappa kappa with three raters

7 Subject index 391 reliability, continued Kuder Richardson coefficient of reliability prophecy formula split-half test retest weighted kappa rename command rename variable repeated-measures ANOVA repeated-measures t test replace command...60, 159 reshape command reshape wide to long format residual...254, 255 response variables Results window... 8 more... 4 scroll size... 4 return list command reverse coding reverse-code variables...56 Review window... 8 robust regression root mean squared error S sample, draw sample command...138, 181 sampsi command save command saved estimates saved statistics scale construction reverse coding scale creation scatter command scattergram scattergram with confidence interval scattergram with jitter() option..183 Scheffé, multiple comparison schemes scientific notation scree plot S-curve sdtest command seed for starting a random sample..181 semipartial correlation , 270 set more off command...4 set seed command...138, 146, 180 Šidák, multiple comparison significance, statistical substantive skewness... 93, 106, sktest command slope SMCL...84 spearman command Spearman s rho split-half reliability ssc command standardized beta coefficient standardized beta weights standardized regression coefficients Stat/Transfer Stata, limitations Stata bookstore Stata code for textbook examples..372 Stata/IC limitations Stata Journal Stata listserver Stata Markup and Control Language..... see SMCL Stata NetCourses Stata Portal, UCLA...188, 372, 374 Stata screen... 7 Stata tutorial...372, 376 Statalist statistical significance versus substantive significance subcommand, list sum of squares summarize command , 106, 193, summarize(), tabulate option summary of data... 27

8 392 Subject index sunflower command sysuse command T t test, one-sample two-sample tab command tab1 command... 95, 189 tab2 command tabdisp command tabi command table probability summary statistics table command tabstat command...110, 213 tabulate command...59, 63 65, 95, , 129, , tau, measure of association test of significance, kurtosis skewness test postestimation command test retest reliability tests, Bonferroni chi-squared dependent t test likelihood-ratio chi-squared likelihood-ratio chi-squared with logistic regression logistic regression long format for portions Mann Whitney median multiple comparison with correlations nonparametric one-sample t test paired t test proportions , 151 tests, continued rank sum repeated-measures t test skewness and kurtosis two-sample t test unequal variances Wald chi-squared test wide format for proportions z test for proportions z test with logistic regression textbook examples using Stata commands tolerance toolbar, Stata...9 ttest command , 165 tutorial UNC, Population Center two-by-two table two-way ANOVA twoway command , 277, 280 twoway connected command U UCLA Stata Portal... 19, 188, 372 reshaping data wide to long user-written commands V validity, criterion related external predictive value labels... 23, 32 38, 53 55, 76 variable labels variable name...22, 25 Variables Manager , 68 Variables window... 8 variance inflation factor W Wald chi-squared test web search weighted data weighted kappa weights, pweights

9 Subject index 393 wide format , 161, 202, working directory... 9 X xtreg command Z z test, one-sample proportion two-sample proportion zero-inflated models