In all applications of the Kruskal-Wallis test, the alternative hypothesis to be tested is always stated as:
A) the locations of all k populations are the same
B) at least two population locations differ
C) the locations of all w populations differ
D) the locations of all k populations differ
E) at least two population locations are the same

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test is a non-parametric test used to determine whether there is a statistically significant difference between the medians of two or more independent groups. The null hypothesis is that all populations have the same median, while the alternative hypothesis is that at least two populations have different medians. Therefore, the correct answer is B: at least two population locations differ.

In All Applications of the Kruskal-Wallis Test, the Alternative Hypothesis