Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
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