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AP® Statistics

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Purpuse of a Control Group

APSTAT-ZYGEOE

In an experiment, a control group is used to

A

Increase sample size.

B

Control for measurement error by the researchers.

C

Make sure subjects can’t choose which group they are in.

D

Serve as a baseline to compare effects of one treatment to a standard treatment or placebo.

E

Give subjects groups to choose from.