An experimenter wanted to test the effects of cigarette smoking on rats. She infused the cages of 50 rats with cigarette smoke and the cages of another 50 rats with pure, clean air. The rats that received the clean air were the ____.
A) experimental group
B) control group
C) model group
D) predictive group
E) independent group

Question

An experimenter wanted to test the effects of cigarette smoking on rats. She infused the cages of 50 rats with cigarette smoke and the cages of another 50 rats with pure, clean air. The rats that received the clean air were the ____.​
A) experimental group​
B) ​control group
C) ​model group
D) ​predictive group
E) ​independent group

Quizplus · Accepted Answer

The rats that received the clean air served as the control group because they were used as a baseline to compare the effects of cigarette smoke on the experimental group.

An Experimenter Wanted to Test the Effects of Cigarette Smoking