A researcher is interested in variables that may affect an individual's driving ability. He has people drive a course in wet, dry, or icy conditions. In addition, he has them drive a vehicle with or without power steering, and with an automatic or a manual transmission. This design is an example of a _____ factorial.
A)2 × 2
B)3 × 2
C)3 × 2 × 2
D)2 × 2 × 2

Question

Quizplus · Accepted Answer

The design is a 3 × 2 × 2 factorial because there are three levels of the first variable (wet, dry, icy conditions), two levels of the second variable (with or without power steering), and two levels of the third variable (automatic or manual transmission).

A Researcher Is Interested in Variables That May Affect an Individual's