What is a requirement that must be met before the Kruskal-Wallis one-way analysis of variance by ranks test can be applied?
A)Populations must be normal or near normal.
B)Populations must be independent.
C)Population standard deviations must be equal.
D)Data must be at least interval level.

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test requires that the populations being compared be independent. This means that the observations in each group are not related or connected to the observations in any other group. There are no assumptions about the normality of the populations or the equality of their standard deviations. The Kruskal-Wallis test can be used with non-parametric data, which means that it does not require the data to be at least interval level. Therefore, option B is the correct choice.

What Is a Requirement That Must Be Met Before the Kruskal-Wallis