In a two-way contingency table with four rows and four columns, the appropriate degrees of freedom for the chi-square test statistic is
A) 3,3.
B) 15.
C) 3,12.
D) 9.
E) to determine the appropriate degrees of freedom one must know n, the number of subjects in the experiment.

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square test 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.

In a Two-Way Contingency Table with Four Rows and Four