When the groups have equal numbers of participants in them then the test statistic (Ws) for the Wilcoxon rank-sum test is:
A)The value of the smaller summed rank
B)The summed value of the ranks for the two groups
C)The largest rank subtracted by the smallest rank
D)The smallest rank subtracted by the largest rank

Question

Quizplus · Accepted Answer

The Wilcoxon rank-sum test's statistic (Ws) when groups have equal participants is the value of the smaller summed rank. This is because the test compares the distribution of two independent samples by looking at the ranks of their combined data, and the test statistic is calculated based on the sum of ranks for the smaller of the two groups.

When the Groups Have Equal Numbers of Participants in Them