Subject index. Symbols β weights η φ...118

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1 Subject index Symbols β weights η φ A acquiring datasets add, label define option adjust, postestimation command..202, 207 adjusted means agreement, intraclass correlation alpha reliability tabulate command analysis of covariance..... see ANCOVA analysis of variance...see ANOVA ANCOVA ANOVA assumptions ANOVA, degrees of freedom equal-variance test one-way postestimation adjusted means repeated-measures residual two-way anova command ATS at UCLA B bar chart...96, 274 bar graph of means Bartlett test of equal variances beta weights , 224 limitation block regression Bonferroni multiple-comparison test , 187 bookstore, Stata bootstrap regression Boston College Stata site box plot , 196 C casewise deletion categorical predictors, regression cause and effect center command chi-squared table test , 276 chitable command clear command codebook command , 45 46, 120 codebook example coding system coefficient of variation collinearity command structure...66 Command window... 7, 8 comments in do-files confidence interval regression line slope constant conventions used in the book copying, HTML format...16, 78 copying results to word processor...16, 77 correlate command

2 326 Subject index correlation, interpreting limitation multiple comparison correlation ratio , 200 count outcome variables covariate Cramér s V, measure of association creating value labels criterion-related validity cross-tabulation D data, long format , 185 wide format , 184 Data Editor , 47 dataset contents dataset, c10interaction , 257 c11barchart cancer...9, 10 census chores create descriptive gss...90, 107, 108 divorce environ firstsurvey...35 firstsurvey chapter , 72, 81 gss2002 and 2006 chapter gss2002 chapter gss2002 chapter , 142, 143, 145, 152, 160 gss2002 chapter gss2002 chapter gss2002 chapter gss2002 chapter gss2006 chapter , 128 gss2006 chapter , 181 gss2006 chapter8 selected gss2006 chapter , 198 dataset, continued gss2006 chapter , 291 gss2006 chapter12 selected intraclass kappa kuder-richardson long nlsy97 chapter , 160 nlsy97 chapter , 276 nlsy97 selected variables , 242 ops partyid...186, 194, 217 positive...63 relate...42, 63 retest severity spearman , 181 states wide wide datasets, acquisition degrees of freedom, ANOVA one-sample t test dependent t test dependent variable describe command....9, 37 38, 43 dfbeta command dialog box, describe...37 drop egen generate...52 graph bar graph pie...93 histogram , 96 keep label define...30 label values...30 logistic open...53 prtest recode

3 Subject index 327 dialog box, continued regress , scatter Submit vs. OK...15 summarize...10 tab tabi table tabstat tabulate... 55, , 120 ttest , dictionary file difference of means test difference of proportions test do-file, comments continuation line introduction....4 version number...75 Do-file Editor download datasets drop command dummy variables E edit command effect size, , 201, 225 η , 200 egen command , 56 59, 285 egen count command egen rowmean command , 285 egen rowmiss command egenmore command entering data equal variance, Bartlett test ereturn list command estat vif postestimation command estimates store command exit Stata....16, 34 exponentiation external validity F F ratio F test of unequal variances factor analysis, PCF PF commonality eigenvalue...303, 308 exploratory factor analysis extraction factor score , 312 loading oblique rotation , 310 orthogonal rotation , 309 postestimation principal component analysis principal-component factor analysis promax rotation scree plot , 308 simple structure varimax factor variable findit command , 316 fonts, fixed...77 foreach command format, numeric...28 string...29 fre command , 93 frequency distributions ftable command G gamma, measure of association generate command geometric mean...87 Goodman and Kruskal s gamma, measure of association GradPlan graph, bar chart... 96, 127, 274 box plot collinearity hanging rootogram heteroskedasticity...231

4 328 Subject index graph, continued histogram , 226 medians overlay two-way showing interaction effects pie chart...93 residual versus fitted scattergram graph bar command , 192, 274 graph box command graphics book GUI interface, Prefs... 6 H harmonic mean...87 help...4 video...17 web-based help label command help, listcoef option heteroskedasticity hierarchical regression , histogram histogram command , 226 HTML format...78 I increment in R independent variable indicator variables interaction term interaction, regression interactive table intercept interquartile range interval-level variables...86 intraclass correlation , 214 J jitter(), scatter option K kappa kappa with three raters kappa, weighted keep command Kendall s tau, measure of association Kruskal Wallis test, ANOVA alternative Kuder Richardson coefficient of reliability kurtosis... 89, 101, kurtosis, test of significance L label define command , 47 label values command , 48 label variable command...29 labeling values labeling variables...20, 29 likelihood-ratio chi-squared test limitations of Stata list command , 186 list, ereturn saved estimates list option, nolabel list, return saved statistics listcoef command listwise deletion log files...78 log files and graphs...79 log,.smcl extension...79 logistic command logistic regression , bar chart exponentiation hypothesis tests interpreting odds ratio likelihood-ratio chi-squared test logits McFadden pseudo-r nonlinear odds ratio percentage change pseudo-r S-curve...262

5 Subject index 329 logistic regression, continued vs. OLS regression Wald chi-squared test logit command , logits loneway command long format , 148, 185, lrdrop1 command lrtest command M manova command maximum number of variables McFadden pseudo-r mean squares means, adjusted measure of association, η , 200 odds ratio φ V median command median, graph box plot menu, open...53 missing values...25, 46, 54, 67 types...45, 46 missing, count modify, label define option more command , 59 multicollinearity multiple comparison, Bonferroni Scheffé Šidák multiple comparison and correlation multiple correlation multiple regression command multiple regression diagnostics multiple regression with interaction term multiple regression, block categorical predictors dummy variables multiple regression, continued hierarchical indicator variables influential case nested outlier residual weighted data mvdecode command , 54, 146 N naming variables nested regression , nestreg command , NetCourses nolabel, edit option nolabel, list option nominal-level variables nonlinear nonparametric ANOVA alternatives nonparametric tests Mann Whitney median rank sum normally distributed residuals numlabel command....70, 93 O odds ratio , 264 interpretation percentage change OLS regression vs. logistic regression omega2 command one-sample t test one-way ANOVA oneway option bonferroni scheffe sidak open existing dataset Stata-installed dataset....8 optifact command

6 330 Subject index option, add, label define...32 help, listcoef jitter(), scatter modify, label define nolabel, edit...48 percent, listcoef ordinal-level variables...86 outlier P paired t test part correlation pasting,...78 reformatting...77 pasting results to word processor, formatting...77 pcorr2 command , 246 Pearson s chi-squared percent, listcoef option pie chart...93 plot a confidence interval Poisson regression postestimation command, adjust...202, 207 estat vif predict , 251, 254 test power analysis predict postestimation command , 251, 254 predict postregression predictive validity probability tables product term project outline prophecy formula proportions, one-sample test two-sample test prtest command pseudo-r pwcorr command pweights Q qualifier, if with missing values in...68 R R change random sample how to draw random sampling randomization alternative to how to perform ranksum command recode command , 242 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 Kuder Richardson coefficient of reliability prophecy formula split-half...290

7 Subject index 331 reliability, continued test retest weighted kappa rename command rename variable repeated-measures ANOVA repeated-measures t test replace command....51, 146 replace, save option reshape command reshape wide to long format residual...199, 230, 231 response variable Results window...7 more...59 scroll size...59 return list command reverse coding reverse-code variables Review window...7 robust regression root mean squared error S S-curve sample command sample, draw sample-size estimation sampsi command save command , 62 saved estimates saved statistics scale construction reverse coding scale creation scatter command scattergram scattergram with confidence interval scattergram with jitter() option..165 Scheffé, multiple comparison schemes scientific notation sdtest command seed for starting a random sample..162 semipartial correlation , 246 set more off command set seed command , 162 Šidák, multiple comparison significance, statistical substantive skewness... 89, 101, sktest command slope SMCL...79 spearman command Spearman s rho split-half reliability ssc command standardized beta coefficient standardized beta weights standardized regression coefficients Stat/Transfer Stata bookstore Stata code for textbook examples Stata Journal Stata, limitations Stata listserver Stata Markup and Control Language.....see SMCL Stata NetCourses Stata Portal, UCLA...170, 316, 318 Stata screen...5 Stata tutorial , 319 Stata/IC limitations Statalist statistical significance versus substantive significance subcommand, list sum of squares summarize command , 101, 175, summarize(), tabulate option summary of data...25 summary statistics, one/two-way table...204

8 332 Subject index sunflower command sysuse command T t test, one-sample two-sample tab1 command... 91, 171 tab2 command tabdisp command tabi command table means with repeated ANOVA one/two-way probability summary statistics , 203 table command , 203, 212 tabodds command tabstat command , 195 tabulate command , 91, , , tau, measure of association test of significance, kurtosis skewness test postestimation command 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 , 139 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..276 test retest reliability textbook examples using Stata programs tolerance toolbar, Stata....8 ttest command , 152 tutorial UNC, Population Center two-by-two table two-way ANOVA twoway command , 251, 254 twoway connected command U UCLA Stata Portal... 17, 170, 316 reshaping data wide to long user-written commands V validity, criterion related external predictive value labels... 21, 30 33, 47 48, 70 variable labels...20, 29 variable name...20, 23 Variables window...7 variance inflation factor version number in do-file...75 W Wald chi-squared test web search weighted data

9 Subject index 333 weighted kappa weights, pweights wide format , 149, 184, working directory...8 X xtmixed command Z z test, one-sample proportion two-sample proportion zero-inflated models...267