To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. There is evidence that the before and after exam scores are not normally distributed. Which of the following tests will be the most appropriate?
A) pooled-variance t test
B) Wilcoxon signed rank test
C) Wilcoxon rank sum test
D) paired t test

Question

Quizplus · Accepted Answer

Since the before and after exam scores are not normally distributed, a parametric test like the paired t test (D) or pooled-variance t test (A) would not be appropriate. Instead, a non-parametric test like the Wilcoxon signed rank test (B) would be best suited for this situation. The Wilcoxon rank sum test (C) would not be appropriate since it is used to compare two independent groups, whereas this scenario involves comparing the same group before and after an intervention.

To Test the Effectiveness of a Business School Preparation Course