In a Wilcoxon rank sum test, the two sample sizes are 6 and 6, and the value of the Wilcoxon test statistic is T = 20. If the test is two-tailed and the level of significance is $\alpha = 005$ , then:
A) the null hypothesis will be rejected.
B) the null hypothesis will not be rejected.
C) the alternative hypothesis will not be rejected.
D) not enough information has been given to answer this question.

Question

Quizplus · Accepted Answer

The critical value for a two-tailed Wilcoxon rank sum test with 6 observations in each sample at the 0.05 level of significance is 18. Therefore, since T = 20 > 18, the null hypothesis can be rejected.

In a Wilcoxon Rank Sum Test, the Two Sample Sizes α=005\alpha = 005α=005

In a Wilcoxon Rank Sum Test, the Two Sample Sizes $\alpha = 005$