Mann–Whitney U test

The Mann–Whitney test (also called the Mann–Whitney–Wilcoxon (MWW/MWU), Wilcoxon rank-sum test, or Wilcoxon–Mann–Whitney 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 on two dependent samples are the sign test and the Wilcoxon signed-rank test.

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