The Wilcoxon rank-sum test is a nonparametric test that uses two independent simple random samples to determine whether the relative frequency distributions of two statistical populations of continuous values are identical to or different from one another.

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The Wilcoxon rank-sum test is indeed a nonparametric test that compares two independent samples to determine if they come from the same statistical population or not. It works by comparing the ranks of the samples rather than their actual values.

The Wilcoxon Rank-Sum Test Is a Nonparametric Test That Uses