An Experiment Was Conducted to Test the Effects of Coupon

Multiple Choice

An experiment was conducted to test the effects of coupon value on redemption.Personal interviews were conducted in New York with 280 shoppers who were entering a supermarket.These shoppers were given a coupon for one of four brands prior to entering the store.Two coupon values were used,one offering 15-cents off and the other 50-cents off.Shoppers were randomly assigned to these two coupon-value levels.Four brands-Tide detergent,Kellogg's corn flakes,Aim toothpaste,and Joy liquid dishwashing detergent were used.These same shoppers were re-interviewed upon leaving the store and asked to report on any coupons used in the store.What extraneous variable most likely will influence the results of this experiment?

A) maturation
B) mortality
C) statistical regression
D) history
E) testing effects