Mathematics, 31.07.2020 14:01 ben2005

A researcher wishes to examine the effects of a new medical treatment on patients with Alzheimer's disease. The researcher plans to examine the effects on a group of randomly selected subjects. What is wrong with this design? Select all that apply. A. A control group is not used. B. Only one researcher is used. C. Subjects are not randomly assigned to an experimental group and control group. D. An entire population is not used.

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