If we use the $\chi ^ { 2 }$ method of analysis to test for the differences among 4 proportions, the degrees of freedom are equal to:
A) 3
B) 4
C) 5
D) 1

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square test of independence with k rows and l columns is (k-1)(l-1). In this case, we have 4 proportions, so k=4. Therefore, the degrees of freedom are (4-1)(4-1) = 3.

If We Use The χ2\chi ^ { 2 }χ2 Method of Analysis to Test for the Differences Among 4

If We Use The $\chi ^ { 2 }$ Method of Analysis to Test for the Differences Among 4