The main effect of a variable is
A) the effect of that variable controlling for another variable.
B) the effect of that variable averaged over the levels of other independent variable(s).
C) part of the interaction effect.
D) none of the above

Question

Quizplus · Accepted Answer

The main effect of a variable is the effect of that variable averaged over the levels of other independent variable(s). It is calculated by collapsing the data across the levels of the other variable(s) to obtain an average effect of the variable of interest.

The Main Effect of a Variable Is