Subject index. Symbols β weights η...184, 194 η φ...109

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1 Subject index Symbols β weights η...184, 194 η φ A acquiring datasets add, label define option adjust, postestimation command..195, 200 adjusted means agreement, intraclass correlation alpha command alpha reliability analysis of covariance..... see ANCOVA analysis of variance...see ANOVA ANCOVA angle(), twoway option ANOVA, degrees of freedom equal-variance test one-way postestimation adjusted means repeated-measures residual two-way ANOVA assumptions ATS at UCLA B bar chart...86, 263 bar graph of means Bartlett test of equal variances beta weights , 216 limitation block regression Bonferroni multiple-comparison test , 181 bookstore, Stata Boston College Stata site box plot...95, 190 C casewise deletion categorical predictors, regression cause and effect chi-squared table chi-squared test...104, 264 chitable command clear command codebook command.. 26, 35 36, 42 43, 111 codebook example coding system coefficient of variation...94 collinearity command alpha anova , 200 center chitable clear...28 codebook... 26, 35 36, 42 43, 111 correlate describe...8, 37 38, 41 dfbeta drop edit...45 egen...48, egen rowmean...55 egen rowmiss...54 egenmore...54

2 282 Subject index command, continued ereturn list estimates store findit...106, 272 ftable generate graph bar , 187, 263 graph box help label...35 histogram , 218 kap keep label define , 44 label values , 45 label variable...30 list , 180 listcoef logistic logit...252, loneway lrdrop lrtest manova median more...35, 56 mvdecode...43, 51 nestreg , numlabel...66 omega optifact pcorr , 236 prtest pwcorr ranksum recode , 232 regress , , , rename replace...48, 134 reshape return list sample sampsi save...34, 58 scatter command, continued sdtest set more off...56 set seed sktest spearman ssc summarize , 91, 163, sunflower sysuse tab1...83, 160 tab , 233 tabdisp tabi table , 197, 206 tabodds tabstat...94, 189 tabulate , 83, , , ttable ttest , 140 twoway , 241, 244 twoway connected use...9 webuse...9 xtmixed command structure...62 Command window...6, 7 comments in do-files...70 confidence interval regression line slope constant conventions used in the book...16 copying, HTML format...73 copying results to word processor correlate command correlation, interpreting limitation multiple comparison correlation ratio...184, 194 count outcome variables covariate...193

3 Subject index 283 Cramér s V, measure of association creating value labels cross-tabulation D data, long format...129, 179 wide format...127, 179 Data Editor , 44 dataset c10interaction...241, 247 c11barchart cancer...8, 9 census...246, 247 chores contents...34 create descriptive gss...83, 98, 99 divorce environ firstsurvey...35 firstsurvey chapter , 67, 75 gss2002 chapter , 118 gss2002 chapter , 130, 131, 133, 140, 147, 148 gss2002 chapter , 163, 175 gss2002 chapter , 192, 209, 210 gss2002 chapter , 247 gss2002 chapter hsb2...9 intraclass kappa long nlsy97 chapter nlsy97 fp...58 nlsy97 selected variables , 176, 210, 232, 257 ops partyid...180, 188, 210 positive...59 relate...40, 59 severity dataset, continued spearman...167, 176 states survey...16 wide wide datasets, acquisition degrees of freedom, ANOVA one-sample t test dependent t test dependent variable describe command...8, 37 38, 41 dfbeta command dialog box describe...37 drop egen generate...49 graph bar graph box...97 graph pie...85 histogram , 86 keep label define...31 label values...31 logistic prtest recode regress...164, scatter submit vs. OK...15 summarize...10 tab tabi table tabstat...94 tabulate , , 111 ttest , dictionary file...40 difference of means test difference of proportions test do-file, comments...70 continuation line

4 284 Subject index do-file, continued introduction...3 version number...70 Do-file Editor...67 download datasets drop command dummy variables E edit command...45 effect size, η...184, 194 egen command...48, egen rowmean command...55 egen rowmiss command...54 egenmore command...54 entering data equal variance, Bartlett test ereturn list command estat vif postestimation command estimates store command exit Stata...16, 35 exponentiation F F ratio F test of unequal variances factor variable findit command , 272 fonts, fixed...72 format numeric...29 string...30 frequency distributions...83 ftable command G gamma, measure of association generate command Goodman and Kruskal s gamma, measure of association GradPlan graph, bar chart...86,116, 263 box plot...95 graph, continued collinearity heteroskedasticity histogram...89, 218 medians overlay two way for ANOVA overlay two way showing interaction effects pie chart...85 residual versus predicted scattergram sunflower scattergram graph bar command graph box command graphics book GUI interface, Prefs H help, video...18 web-based...18 help, listcoef option heteroskedasticity hierarchical regression , histogram...89 histogram command , 218 HTML format...73 I increment in R independent variable indicator variables interaction term interaction, regression interactive table intercept interquartile range interval-level variables...80 intraclass correlation...207, 208 J jitter(), scatter option

5 Subject index 285 K kap command keep command Kendall s tau, measure of association Kruskal Wallis test, ANOVA alternative kurtosis...82, 91, kurtosis, test of significance...91 L label define command , 44 label values command , 45 label variable command...30 labeling values labeling variables...22, 30 legend(), twoway option likelihood-ratio chi-squared test limitations of Stata list command list, ereturn saved estimates list option, nolabel list, return saved statistics listcoef command listwise deletion log files...73 log files and graphs...74 log,.smcl extension...73 logistic command logistic regression,...110, bar chart exponentiation hypothesis tests interpreting odds ratio likelihood-ratio chi-squared test logits McFadden pseudo-r nonlinear odds ratio percent change pseudo-r S-curve logistic regression vs. OLS regression logistic regression Wald chi-squared test logit command logits loneway command long format...129, 136, 179, lpattern(), twoway option lrdrop2 command lrtest command M manova command maximum number of variables McFadden pseudo-r mean squares means, adjusted measure of association, η...184, 194 odds ratio φ V median command median, graph box plot missing values...26, 43, 51, 63 types...42, 43 modify, label define option more command...35, 56 msize(), twoway option msymbol(), twoway option 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

6 286 Subject index multiple regression, continued categorical predictors dummy variables hierarchical indicator variables influential case nested outlier residual weighted data mvdecode command... 43, 51, 134 N naming variables...24 nested regression , nestreg command , NetCourses nolabel, list option nolabels, edit option...45 nominal-level variables...80 nonlinear nonparametric ANOVA alternatives nonparametric tests, Mann Whitney median rank sum normally distributed residuals numlabel command...66 O odds ratio,...110, 255 interpretation percent change OLS regression vs. logistic regression omega2 command on, legend() suboption one-sample t test one-way ANOVA oneway option bonferroni scheffe sidak open, existing dataset Stata dataset on web...9 Stata installed dataset...7 web dataset... 9 optifact command option add, label define...33 help, listcoef jitter(), scatter modify, label define...33 nolabels, edit...45 percent, listcoef order(), legend() suboption ordinal-level variables...80 outlier P paired t test part correlation pasting,...73 reformatting...72 pasting results to word processor,...67 formatting...72 pcorr2 command Pearson s chi-squared percent, listcoef option pie chart...85 plot a confidence interval Poisson regression postestimation command adjust...195, 200 estat vif predict , 241, 244 test power analysis predict postestimation command , 241, 244 predict postregression preferences...6 probability tables product term project outline...40

7 Subject index 287 proportions, one-sample test two-sample test prtest command pseudo-r pwcorr command pweights Q qualifier if with missing values...63 in...64 R R R 2 change...216, 217 random sample, how to draw random sampling randomization, alternative to how to perform ranksum command recode command , 232 recoding, ranges...47 regress command , , , regression, block categorical predictors dummy variables hierarchical indicator variables influential case nested outlier residual weighted data regression diagnostics regression line, plotting regression with interaction term reliability,...168, 170 alpha kappa rename command rename variable repeated-measures ANOVA repeated-measures t test replace command...48, 134 replace, save option...58 reshape command reshape wide to long format residual...194, 220, 221 response variable Results window...6 more...56 scroll size...56 return list command reverse-code variables...45 Review window...6 root mean squared error S S-curve sample, draw sample command sample-size estimation sampsi command save command...58 saved estimates saved statistics scale creation scatter command scattergram scattergram with confidence interval scattergram with jitter() option..154 Scheffé, multiple comparison schemes s1monoschrome...14 scientific notation sdtest command seed for starting a random sample..151 semipartial correlation...216, 236 set more off command...56 set seed command Šidák, multiple comparison...181

8 288 Subject index significance, statistical substantive skewness...82, 91, sktest command slope SMCL...73 sort, twoway option spearman command Spearman s rho ssc command standardized beta coefficient standardized beta weights standardized regression coefficients Stat/Transfer Stata bookstore Stata code for textbook examples..272 Stata Intercooled version limitations Stata Journal Stata, limitations Stata listserver Stata Markup and Control Language.....see SMCL Stata NetCourses Stata Portal, UCLA...159, 272, 274 Stata screen...3 Stata tutorial , 274 Statalist statistical significance vs. substantive significance subcommand list sum of squares summarize command , 91, 163, summarize(), tabulate option summary of data...26 summary statistics, one/two-way table sunflower command sunflower scattergram sysuse command T t test, one-sample two-sample tab1 command...83, 160 tab2 command , 233 tabdisp command tabi command table, means with repeated ANOVA one/two-way probability summary statistics...189, 197 table command , 197, 206 tabodds command tabstat command...94, 189 tabulate command , 83, , , tau, measure of association test of significance kurtosis...91 skewness...91 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 , 127 rank sum repeated-measures t test skewness and kurtosis

9 Subject index 289 tests, continued 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 programs title(), legend() suboption title(), twoway option tolerance tool bar, Stata...7 ttable command ttest command , 140 tutorial tutorial, University of North Carolina, Population Center two-by-two table two-way ANOVA twoway command , 241, 244 twoway connected command weighted data weights pweights wide format...127, 137, 179, working directory...7 X xlabel(), twoway option xtmixed command Z z test, one-sample proportion two-sample proportion zero-inflated models U UCLA Stata Portal...18, 159, 272 UCLA web link reshape command use command...9 user-written commands V value labels...22, 30 33, 44 45, 66 valuelabel, twoway option variable labels...22, 30 variable name...22, 24 Variables window...6 variance inflation factor version number in do-file...70 W Wald chi-squared test web search webuse command...9

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

Subject index. Symbols β weights η φ...118 Subject index Symbols β weights...224 η 2...190 φ...118 A acquiring datasets.... 319 add, label define option.....32 adjust, postestimation command..202, 207 adjusted means...202 agreement, intraclass