More Than One Independent Variable Melanie studied the effects of discount coupons (coupons or no coupons) and product placement (near checkout counter or aisle) on potato chip sales.How many main effects were possible in this study?

Question

Quizplus · Accepted Answer

There are two independent variables in this study (discount coupons and product placement), so there are two main effects possible: the effect of coupons on potato chip sales and the effect of product placement on potato chip sales.

More Than One Independent Variable Melanie Studied the Effects of Discount