The distribution of T-values in the Wilcoxon Matched-Pairs Signed Rank test is approximately normal if the sample size (number of matched pairs) exceeds 25.

Question

Quizplus · Accepted Answer

The Central Limit Theorem suggests that as the sample size increases, the distribution of the test statistic (in this case, T-values from the Wilcoxon Matched-Pairs Signed Rank test) approaches a normal distribution. A common rule of thumb is that this approximation is reasonable for sample sizes larger than 25.

The Distribution of T-Values in the Wilcoxon Matched-Pairs Signed Rank