The z-test approximation to the Wilcoxon rank sum test for two independent samples requires that both sample sizes are larger than 10.

Question

Quizplus · Accepted Answer

The z-test approximation to the Wilcoxon rank sum test is generally considered appropriate when both sample sizes are larger than 10, as this condition helps ensure the central limit theorem applies, making the approximation more accurate.

The Z-Test Approximation to the Wilcoxon Rank Sum Test for Two