The dean of Oxnard business school wants to know if there is a difference in computer skills in four majors (marketing, finance, operations, accounting). A 20-question skills test is given to 10 randomly chosen students in each major. Which nonparametric test could be used by the dean to see if there is a difference in computer skills of students in the various majors?
A)Wald-Wolfowitz test
B)Wilcoxon signed-rank test
C)Mann-Whitney test
D)Kruskal-Wallis test

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test is a nonparametric test used to compare three or more groups. It is used when the assumptions of parametric tests, such as ANOVA, are violated. In this case, the dean wants to compare the computer skills of four majors, so the Kruskal-Wallis test would be appropriate. Options A and B are not appropriate as they are one-sample tests, and option C is used to compare two groups.

The Dean of Oxnard Business School Wants to Know If