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

Question

Quizplus · Accepted Answer

The number of degrees of freedom in a chi-square test of independence is determined by the number of categories being tested. For a contingency table with r rows and c columns, the degrees of freedom are calculated as (r-1)(c-1). Therefore, the number of degrees of freedom associated with the chi-square distribution in a test of independence is the number of rows minus 1 times the number of columns minus 1.

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