A researcher is interested in examining the effect of background music and lighting on sales in a restaurant, so he wants to conduct an experiment that manipulates different levels of each. Which experimental design would be best to examine the effects of these two treatments at various levels?
A) completely randomized design
B) randomized-block design
C) interactive design
D) factorial design

Question

Quizplus · Accepted Answer

A factorial design would be the best choice as it allows for manipulating and testing the effects of multiple treatments and their different levels simultaneously. In this case, the researcher can manipulate background music and lighting at different levels and observe their combined effects on sales.

A Researcher Is Interested in Examining the Effect of Background