Suppose the Wilcoxon signed-rank test was used on seven pairs of data. If the calculated test statistic for a two-tailed test was found to be 5, at α = 0.05 we can conclude that
A) The null hypothesis should not be rejected and that the groups are all the same.
B) The null hypothesis should be rejected and that the groups are not all the same.
C) The null hypothesis should not be rejected and that the groups are not all the same.
D) The null hypothesis should be rejected and that the groups are all the same.
E) The groups are different.

Question

Quizplus · Accepted Answer

The critical value for a two-tailed Wilcoxon signed-rank test with n=7 at α=0.05 is 2. Since the test statistic 5 is greater than the critical value, we do not reject the null hypothesis.

Suppose the Wilcoxon Signed-Rank Test Was Used on Seven Pairs