damonlinn57611 damonlinn57611

08-03-2024
Health

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Which of the following is the BEST reason to include a placebo in the experimental design of a human intervention trial?
1) the researcher do not know who is receiving an intervention and who is not
2) placebo reduces the cost of the study
3) it helps prevent the expectations of the subjects from biasing the research
4) it makes it possible to include a larger number of subjects in the experiment

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