Planet Fitness is a franchise with a national chain of fitness centers. Effective August 1st, 2020, all members must wear a face cover while exercising at any Planet Fitness location. Suppose you want to learn how this face-cover requirement can impact outcomes of interest at Planet Fitness. Potential dependent variables may include customer satisfaction, member retention, the number of daily visits by members, or the sale of food and beverages at Planet Fitness.

When considering the Planet Fitness scenario, if you were to conduct a true experiment on how their face mask requirement affected customer satisfaction, what are examples of the following terms and describe how these terms would be applied to the specific scenario involving Planet Fitness.

a. Control group

b. Treatment group

c. Pre period

d. Post Period

e. Manipulation

f. Confounding variable