If one rejects the null hypothesis when using the Kruskal-Wallis H test, then:
A) all the groups differ significantly from one another.
B) at least one of the groups differs significantly from another, but you do not know which one.
C) the group ranks are similar.
D) the largest difference between a ranked pair is at least two times the smallest difference.

Question

Quizplus · Accepted Answer

Rejecting the null hypothesis when using the Kruskal-Wallis H test indicates that at least one of the groups differs significantly from another, but you do not know which one. It does not necessarily mean that all the groups differ significantly from one another.

If One Rejects the Null Hypothesis When Using the Kruskal-Wallis