Two study designs are described here. Which statement is a correct interpretation of the designs?
Answer
A
Design A is an observational study because store employees will just note what naturally occurred; Design B is not an observational study because coupons could influence guests.
B
Design A is NOT an observational study because store employees did not make the ads available to all of its shoppers; Design B is an observational study because hotel management will just note what naturally occurred.
C
Design A is an observational study because store employees tried to influence the shoppers to take an ad by handing them to them as they entered the supermarket; Design B is the observational study because hotel management will just note what naturally occurred.
D
Both Designs A and B are observational studies because store employees will just note what naturally occurred, and the hotel management did not try to influence any of its guests to visit the restaurant.