In a study of how vitamin E may reduce the risk of cardiovascular disease, one group was given a placebo, and the other group was given vitamin E supplements. The group that received the placebo was the _______ group.
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The answer is A. The group thed that received placebo was called the
control group In treatment, a control group is designed to assess
treatment effect.
So the researchers could see whether the actual treatment is giving an effect or not.
It operate like some sort of benchmark
So the researchers could see whether the actual treatment is giving an effect or not.
It operate like some sort of benchmark
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