One should use a chi-square test to study the change in distribution of preferred brand of toothpaste from before to after a new advertising campaign. (True or False)

Question

Quizplus · Accepted Answer

A chi-square test is used to compare categorical variables in different populations, but to study the change in distribution of a single categorical variable over time, a McNemar's test would be more appropriate.

One Should Use a Chi-Square Test to Study the Change