To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. Suppose the before and after exam scores are both normally distributed. Which of the following tests will be the most appropriate?
A) Pooled-variance t test
B) Paired t test
C) Wilcoxon rank sum test
D) McNemar test

Question

Quizplus · Accepted Answer

The paired t test is the most appropriate choice to test the effectiveness of the business school preparation course because there are two related samples (before and after scores of the same students) and we want to compare the means of these two samples. The pooled-variance t test assumes independence between two samples, which is not the case here. The Wilcoxon rank sum test is used for independent samples and does not take into account the relationship between the before and after scores. The McNemar test is used for paired categorical data, not continuous data.

To Test the Effectiveness of a Business School Preparation Course