Which of the following statements correctly describes the Wilcoxon signed-rank test?
A) It makes use of the sign and the magnitude of the rank of the differences between pairs of measurements.
B) It is concerned with the analysis of a single population.
C) It cannot cope with ordinal data.
D) It makes use of the sign but does not consider the magnitude of the differences between pairs of measurements.

Question

Quizplus · Accepted Answer

The Wilcoxon signed-rank test is a nonparametric test that compares two related samples to determine whether their population mean ranks differ. It makes use of the sign and the magnitude of the rank of the differences between pairs of measurements, thus choice A is the correct one. Choice B is incorrect because the Wilcoxon signed-rank test compares two related samples, not a single population. Choice C is incorrect because the Wilcoxon signed-rank test can handle ordinal data. Choice D is incorrect because the test does take into account the magnitude of the differences between pairs of measurements.

Which of the Following Statements Correctly Describes the Wilcoxon Signed-Rank