In a normal approximation to the Wilcoxon signed-rank test, the test statistic is calculated as z = 1.36. For a two-tailed test, what is the p-value?
A) 0.0869
B) 0.1738
C) 0.2066
D) 0.4131

Question

Quizplus · Accepted Answer

The p-value for a two-tailed test can be found by doubling the probability of obtaining the observed test statistic or a more extreme value. Using a standard normal distribution table, we find that the probability of obtaining a z-score of 1.36 or higher is 0.0869. Doubling this gives us a p-value of 0.1738. Therefore, the correct answer is B.

In a Normal Approximation to the Wilcoxon Signed-Rank Test, the Test