Chemistry, 12.02.2021 18:50 patrick171888
Half of the subjects (the study volunteers) were given a placebo. The other half were given the vaccine. This created two groups: the placebo group and the vaccine group. The study used a random process to choose which subjects were assigned to each group. Why would subjects be randomly assigned to the groups?
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Half of the subjects (the study volunteers) were given a placebo. The other half were given the vacc...
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