Question

The Wilcoxon Signed-Rank Test requires that the difference scores be rank-ordered. What is the purpose of rank-ordering the difference scores?

1) To determine the significance of the difference scores
2) To calculate the mean of the difference scores
3) To identify outliers in the difference scores
4) To visualize the distribution of the difference scores

Answer 1

The purpose of rank-ordering the difference scores in the Wilcoxon Signed-Rank Test is to determine the significance of the difference scores.

Step-by-step explanation:

The purpose of rank-ordering the difference scores in the Wilcoxon Signed-Rank Test is to determine the significance of the difference scores.

The test uses the ranks of the difference scores to calculate the test statistic, which is compared to a critical value to determine if the difference is statistically significant. By rank-ordering the difference scores, we can compare their magnitudes and determine their significance.