In a chi-square test of independence, the number of degrees of freedom equals the:
A)number of observations minus one.
B)number of categories minus one.
C)number of rows minus one times the number of columns minus one.
D)number of sample observations minus the missing observations.

Question

Quizplus · Accepted Answer

The number of degrees of freedom in a chi-square test of independence is calculated by multiplying the number of rows minus one by the number of columns minus one. This gives an estimate of the number of independent pieces of information available in the data after accounting for the constraints of the row and column totals. Therefore, the correct answer is C.

In a Chi-Square Test of Independence, the Number of Degrees