The Kruskal-Wallis test can be used to determine whether a difference exists between two populations. However, to determine whether one population location is larger than another, we must apply the Wilcoxon rank sum test.

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The Kruskal-Wallis test is used for comparing more than two groups, while the Wilcoxon rank sum test is specifically for comparing two groups to determine if one is larger than the other.

The Kruskal-Wallis Test Can Be Used to Determine Whether a Difference