A chi-square test for independence is applied to a contingency table with four rows and four columns for two qualitative variables. The degrees of freedom for this test must be 9.

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square test for independence in a contingency table is calculated as (number of rows - 1) * (number of columns - 1). For a 4x4 table, it is (4-1)*(4-1) = 3*3 = 9.

A Chi-Square Test for Independence Is Applied to a Contingency