The number of degrees of freedom associated with the chi-square distribution in a test of independence is
A) number of sample items minus 1.
B) number of populations minus 1.
C) number of rows minus 1 times number of columns minus 1.
D) number of populations minus number of estimated parameters minus 1.

Question

Quizplus · Accepted Answer

The number of degrees of freedom associated with the chi-square distribution in a test of independence is calculated as (number of rows - 1) times (number of columns - 1) for a contingency table with r rows and c columns. Therefore, the correct choice is C.

The Number of Degrees of Freedom Associated with the Chi-Square