In a Kruskal-Wallis test for comparing three populations, the test statistic is calculated as H = 2.80. If the test is conducted at the 5% significance level, then what may one conclude?
A) The null hypothesis will be rejected.
B) The null hypothesis will not be rejected.
C) The test results are inconclusive.
D) The t test for matched pairs must be used.

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test statistic H = 2.80 is compared to a chi-square distribution with degrees of freedom equal to the number of groups minus one. For three groups, the critical value at the 5% significance level is approximately 5.99. Since 2.80 is less than 5.99, the null hypothesis is not rejected.

In a Kruskal-Wallis Test for Comparing Three Populations, the Test