A college instructor is interested in whether assigning mandatory homework affects students' grades.Since she is currently teaching two sections of the same class, the instructor assigns homework to one of the classes and just recommends homework problems to the second class.Then she determines the number of people in each class that will receive an A, B, C, D, or F on the final exam.What type of statistical test should the instructor use to analyze her data?
A) chi-square test for goodness-of-fit
B) chi-square test for independence
C) analysis of variance
D) independent-samples t test

Question

Quizplus · Accepted Answer

The instructor is comparing the grades of two groups (one with mandatory homework and one with recommended homework) which are independent of each other. Therefore, a chi-square test for independence would be appropriate to analyze the data.

A College Instructor Is Interested in Whether Assigning Mandatory Homework