Which of the following is used to compare the medians from two samples?

a. Spearman rank

b. Kruskal-Wallis one-way ANOVA

c. Wilcoxon rank test

d. Mann-Whtney U

d. Mann-Whitney U test

Mann-Whitney U test is a popular nonparametric test to compare outcomes between two independent groups where it is used to test whether two samples are likely to derive from the same population (i.e., that the two populations have the same shape) or a test used in comparing the medians between two populations from different samples.