In the Wilcoxon signed-rank test, if two or more measurements have the same non-zero difference, signs ignored, then what would be the logical next step?
A) The scores are eliminated from the analysis.
B) The scores are assigned the lowest rank of the tied values.
C) The scores are assigned the highest rank of the tied values.
D) The average of the ranks of the tied values is assigned.

Question

Quizplus · Accepted Answer

The Wilcoxon signed-rank test ranks the absolute differences between paired measurements, ignoring the signs. When there are tied values, the ranks are assigned based on their average value. This ensures that the tied values are given equal weight in the analysis. Therefore, the best choice would be to assign the average rank to the tied values. Option D is the only choice that suggests this next logical step.

In the Wilcoxon Signed-Rank Test, If Two or More Measurements