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)Kruskal-Wallis rank Test.

Question

Quizplus · Accepted Answer

The paired t-test is appropriate when comparing the same group of individuals before and after an intervention, such as the business school preparation course in this case. The other tests listed are not appropriate for this type of analysis. The pooled-variance t-test is typically used when comparing two independent groups, the Wilcoxon rank sum test is a non-parametric test that compares two independent groups, and the Kruskal-Wallis rank test is used for comparing three or more independent groups.

To Test the Effectiveness of a Business School Preparation Course,8