The rejection region of the chi-square goodness-of-fit test has k

Question

The rejection region of the chi-square goodness-of-fit test has k - 1 degrees of freedom, where k is the number of categories (called cells).

Quizplus · Accepted Answer

This is true. The degrees of freedom in a chi-square goodness-of-fit test are equal to k - 1, where k is the number of categories or cells being compared. The rejection region is determined based on a chosen level of significance and the degrees of freedom.