The Wilcoxon signed-rank test:
A) is concerned with the analysis of a single population.
B) cannot be used with ordinal data.
C) makes use of the sign and magnitude of the rank of the differences between pairs of measurements.
D) makes use of the sign, but not the magnitude, of the differences between pairs of measurements.

Question

Quizplus · Accepted Answer

The Wilcoxon signed-rank test is concerned with comparing two related samples and determining if their mean ranks are significantly different. It makes use of the sign and magnitude of the rank of the differences between pairs of measurements. Therefore, choice C is the correct answer. Choice A is incorrect because the test requires two populations to compare. Choice B is also incorrect because the Wilcoxon signed-rank test can be used with ordinal data. Choice D is incorrect because the test uses both the sign and magnitude of the differences between pairs of measurements.

The Wilcoxon Signed-Rank Test