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 by caffeine interaction is
A) 1
B) 2
C) 4
D) 240

Question

Quizplus · Accepted Answer

The degrees of freedom for an interaction in a 2x2 factorial design is calculated as (number of levels of factor A - 1) * (number of levels of factor B - 1). Here, (2-1)*(2-1) = 1.

A Researcher Is Using 60 Participants in a 2 (Levels