The number of degrees of freedom for a contingency table with r rows and c columns is equal to rc,provided that both r and c are greater than or equal to 2.

Question

Quizplus · Accepted Answer

The number of degrees of freedom for a contingency table with r rows and c columns is equal to (r-1)(c-1), not rc. This is because the last row and column can be determined from the other rows and columns, so they are not independent.

The Number of Degrees of Freedom for a Contingency Table