The Wilcoxon signed rank test statistic is approximately normally distributed whenever the number n of nonzero differences in the sample is larger than:
A)10
B)20
C)5
D)15

Question

Quizplus · Accepted Answer

The Wilcoxon signed rank test statistic is approximately normally distributed when the number of nonzero differences in the sample is larger than 20. This approximation allows for the use of normal distribution tables to interpret the test results when the sample size is sufficiently large.

The Wilcoxon Signed Rank Test Statistic Is Approximately Normally Distributed