In a test of the effects of cigarette smoking on physical health and development,groups of monkeys were raised in either a smoke-free or smoke‑infested environment.Monkeys in the smoke-infested environment were assigned to the ________ group.
A) correlational
B) survey
C) control
D) experimental

Question

Quizplus · Accepted Answer

Monkeys in the smoke-infested environment were assigned to the experimental group because they were part of a controlled experiment where researchers manipulated the independent variable (smoke exposure) to measure its effects on the dependent variable (physical health and development). In an experiment, there is always a control group that serves as a baseline comparison to the experimental group, which in this case would be the monkeys raised in a smoke-free environment. Therefore, options A (correlational) and B (survey) are incorrect because they do not involve experimental manipulation or a control group.

In a Test of the Effects of Cigarette Smoking on Physical