# Question

a. What is the difference (if any) between the Wilcoxon rank-sum test and the Mann–Whitney U test?

b. What is the relationship between the Wilcoxon rank-sum test, the Mann–Whitney U test, and the test based on the difference between the average overall ranks in each sample?

b. What is the relationship between the Wilcoxon rank-sum test, the Mann–Whitney U test, and the test based on the difference between the average overall ranks in each sample?

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