APFIVE Purpose of a Control Group
Which of the following is an example of a control group in an experiment?
Experimental Design: In a clinical trial testing a new drug, one group receives the drug while another group receives an identical-looking sugar pill (placebo).
A
A group of participants receiving a placebo, serving as a benchmark to compare the treatment effect.
B
A group that is recruited from a convenience sample without random assignment.
C
A set of historical data used to compare with a current treatment group.
D
A group of participants chosen based on their strong motivation to participate.
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