A researcher designs an experiment by manipulating room temperature (cold, warm, or hot); noise level (quiet or loud); and room color (pink, blue, or black). Identify the possible number of main effects.
A)1
B)2
C)3
D)8

Question

Quizplus · Accepted Answer

There are three independent variables in the experiment, each with multiple levels. Therefore, there can be up to three main effects - one for each independent variable.

A Researcher Designs an Experiment by Manipulating Room Temperature (Cold