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Dr. Smith is designing a study in which 50 people will be administered an experimental drug and 50 people will be administered a placebo. He

Dr. Smith is designing a study in which 50 people will be administered an experimental drug and 50 people will be administered a placebo. He will make sure that all potential respondents are equally likely to end up in either the experimental or control group. What is this practice called? selective assignment random assignment determined assignment confounding assignment

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