10/13/2023 0 Comments Stata 13 tutorial![]() The results of the test will be displayed: ![]() Check both of the boxes below to display a p-value for an exact test and display an estimate of the probability that the variable for the first group is larger than the variable for the second group. The first column, mpg, shows the mpg for a given car while the second column, treat, shows whether or not the car received fuel treatment.Īlong the top menu bar, go to Statistics > Summaries, tables, and tests > Nonparametric tests of hypotheses > Wilcoxon rank-sum test.įor Variable, choose mpg. A Mann-Whitney U test (sometimes called the Wilcoxon rank-sum test) is used to compare the differences between two samples when the sample distributions are not normally distributed and the sample sizes are small (n Data Editor > Data Editor (Browse).
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