What is the primary purpose of the Mann-Whitney U test?
- To calculate the correlation between two variables
- To compare the means of two independent groups
- To compare the medians of two independent groups
- To compare the variances of two independent groups
The Mann-Whitney U test is a nonparametric statistical significance test for determining whether two independent samples were drawn from a population with the same distribution, specifically, it tests the null hypothesis that the medians of two groups are the same.
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