Suppose the Kruskal-Wallis Test Was Used to Compare Four Groups

Suppose the Kruskal-Wallis test was used to compare four groups. If the test statistic value was found to be 9.545, using α = 0.05 we should

A) reject the alternative hypothesis.
B) not reject the null hypothesis.
C) conclude that the groups are all the same.
D) reject the null hypothesis and conclude that at least one of the groups has a different distribution from the others.
E) compare test static with the critical value χ2 = 7.815 and conclude that all four groups have the same distribution.