A researcher is using 60 participants in a 2 (levels of exercise) X 2 (levels of caffeine) between subjects factorial experiment. The degrees of freedom for the exercise main effect is
A) 1
B) 2
C) 4
D) 240

Question

Quizplus · Accepted Answer

The degrees of freedom for a main effect in a factorial design is calculated as the number of levels of the factor minus one. For the exercise factor with 2 levels, the degrees of freedom is 2 - 1 = 1.

A Researcher Is Using 60 Participants in a 2 (Levels