"Wilcoxon rank-sum test" redirects here. For Wilcoxon signed-rank test, see Wilcoxon signed-rank test. The MannâWhitney test (also called the MannâWhitneyâWilcoxon (MWW/MWU), Wilcoxon rank-sum test, or WilcoxonâMannâWhitney test) is a nonparametric statistical test of the null hypothesis that randomly selected values X and Y from two populations have the same distribution. Nonparametric tests used


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