Dr. Lasagna tests a new diet. Overweight adults are weighed and placed into one of two groups so that the weight of the groups is equal to start with. One group of adults is given the new diet and the other is placed on a waiting list. After three months, Dr. Lasagna observes that the group on the new diet weighs less. In this example, the adults who receive the new diet are:

Question

Quizplus · Accepted Answer

The adults who receive the new diet are the experimental group because they are the ones receiving the treatment being tested (the new diet). The control (or comparison) group would be the group on the waiting list who are not receiving the new diet. The fact that the groups were weighed and placed into groups so that the weight was equal to start with suggests that they were randomly assigned to the groups. The population would be the entire group of overweight adults that Dr. Lasagna is interested in studying, but the question only asks about the specific groups involved in the study.

Dr Lasagna Tests a New Diet