A chi-square test for independence is used to evaluate the relationship between two variables.If both variables are classified into 2 categories, then what is the df value for the chi-square statistic?
A)df = 1
B)df = 2
C)df = 3
D)cannot determine the value of df from the information provided

Question

Quizplus · Accepted Answer

The degrees of freedom (df) for a chi-square test for independence is calculated as (number of rows - 1) * (number of columns - 1). With both variables having 2 categories, df = (2-1)*(2-1) = 1.

A Chi-Square Test for Independence Is Used to Evaluate the Relationship