Question

The dean of Oxnard business school wants to know if there is a difference in computer skills for students 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?

Multiple Choice

• Mann-Whitney test

• Wald-Wolfowitz test

• Wilcoxon signed-rank test

• Kruskal-Wallis test

Individuals in four different age groups are asked to rate, on a scale of 1 to 10, three flavors of ice creams. Each group has the same number of individuals. Median ratings by the individuals are grouped by the flavor of ice cream and by age group. Which nonparametric test could be used to see if there is a difference in median ratings among the four age groups and three flavors?

Multiple Choice

• Friedman test

• Kruskal-Wallis test

• Mann-Whitney test

• Wilcoxon signed-rank test

Answer 1

The dean of Oxnard business school wants to know if there is a difference in computer skills for students in four majors (marketing, finance, operations, accounting). A 20-question skills test is given to 10 randomly chosen students in each major. Kruskal wallis nonparametric test could be used by the dean to see if there is a difference in computer skills of students in the various major....

Justification---

This is non-parametric method for testing whether samples originate from the same distribution. It is used for comparing two or more independent samples of equal or different sample sizes...hence the ans

.for the 2nd problem

This is a two-factor comparison using medians, so we would use Friedman's test.(ans)

Note-if there is any understanding problem regarding this please feel free to ask via comment box..thank you