A chi-square test for independence is being used to evaluate the relationship between two variables. If the hypothesis test has df = 3, what can a researcher conclude about the two variables?
a.
One variable consists of 2 categories, and the other consists of 3 categories.
b.
Both variables consist of 2 categories.
c.
One variable consists of 2 categories, and the other consists of 4 categories.
d.
Both variables consist of 3 categories.