Syntax - Stata
Equality tests on unmatched dataSyntaxMenuDescriptionOptions for ranksumOptions for medianRemarks and examplesStored resultsMethods and formulasReferencesAlso seeSyntaxWilcoxon rank-sum testranksumvarname[if] [in], by(groupvar)[porder]Nonparametric equality-of-medians testmedianvarname[if] [in] [weight], by(groupvar)[medianoptions]ranksumoption sDescriptionMain by(groupvar)grouping variableporderprobability that variable for first group is larger than variable forsecond groupmedianoptionsDescriptionMain by(groupvar)grouping variableexactperform Fisher s exact testmedianties(below)assign values equal to the median to below groupmedianties(above)assign values equal to the median to above groupmedianties(drop)drop values equal to the median from the analysismedianties(split)split values equal to the median equally between the two groups by(groupvar)is allowed withranksumandmedian; see [D] are allowed withmedian; see[U] >Nonparametric analysis>Tests of hypotheses>Wilcoxon rank-sum testmedianStatistics>Nonparametric analysis>Tests of hypotheses>K-sample equality-of-medians test12 ranksum Equality tests on unmatched dataDescriptionranksumtests the hypothesis that two independent samples (that is,unmatcheddata) are frompopulations with the same distribution by using the Wilcox
Festinger, L. 1946. The significance of difference between means without reference to the frequency distribution function. Psychometrika 11: 97–105. Fisher, R. A. 1935. The Design of Experiments. Edinburgh: Oliver & Boyd. Goldstein, R. 1997.sg69: Immediate Mann–Whitney and binomial effect-size display. Stata Technical Bulletin 36: 29–31.
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