In a Kruskal-Wallis test, the null hypothesis is always that:
A) .
B) .
C) the sequence of observations is random.
D) the k samples are from identical populations.

Question

In a Kruskal-Wallis test, the null hypothesis is always that:
A) . 
B) . 
C) the sequence of observations is random. 
D) the k samples are from identical populations.

Quizplus · Accepted Answer

The Kruskal-Wallis test is used to compare the medians of two or more samples. The null hypothesis is that the k samples come from identical populations, in other words, there is no significant difference in the medians of the populations from which the samples are drawn. Therefore, choice D is the correct answer.

In a Kruskal-Wallis Test, the Null Hypothesis Is Always That