A scientist has designed a weight-loss pill and wants to

Last updated: 7/9/2022

A scientist has designed a weight-loss pill and wants to test it on people. She believes that the pill will cause people to lose 2 pounds while they are sleeping. In order to test this pill, she gives 10 people the pill before they go to sleep for 8 hours, and then weighs them in the morning. She gives another 10 people a different weight-loss pill before they go to sleep for 8 hours, and then weighs them in the morning. This experiment is missing the _____ group.