In a normal approximation to the Wilcoxon signed rank sum test, the test statistic is calculated as z = 1.59. For a two-tail test, the p-value is:
A) 0.3882.
B) 0.0559.
C) 0.1118.
D) 0.4441.

Question

Quizplus · Accepted Answer

The p-value for a two-tailed test is found by doubling the area in one tail. For z = 1.59, the area in one tail is approximately 0.0559. Doubling this gives a p-value of approximately 0.1118.

In a Normal Approximation to the Wilcoxon Signed Rank Sum