In a normal approximation to the Wilcoxon rank sum test, the standardized test statistic is calculated as z = 1.80. In this case, what would the p-value be for a two-tailed test?
A) 0.0359
B) 0.0718
C) 0.2321
D) 0.4641

Question

Quizplus · Accepted Answer

A two-tailed test requires finding the probability of getting a z-score as extreme or more extreme than 1.80 in both directions. Using a standard normal distribution table, we can find the area to the right of 1.80 (0.0359) and double it to get the p-value for the two-tailed test (0.0718).

In a Normal Approximation to the Wilcoxon Rank Sum Test