What is the null hypothesis for a Kruskal-Wallis H test?
A) The number of scores above and below the median are equal.
B) The median differences between two groups are equal.
C) The sum of ranks in each group does not differ between groups.
D) The ranks in two groups are equal to 0.

Question

Quizplus · Accepted Answer

The null hypothesis for a Kruskal-Wallis H test is that the sum of ranks in each group does not differ between groups. Therefore, option C is the correct answer. Option A refers to a null hypothesis for a sign test, option B refers to a null hypothesis for a Wilcoxon-Mann-Whitney test, and option D is not a valid null hypothesis for any statistical test.

What Is the Null Hypothesis for a Kruskal-Wallis H Test