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What is the main purpose of randomly assigning participants to groups in a fair test of a medicine?

Answer and explanation

Correct answer: Reduce the effect of pre-existing differences between groups

Random assignment reduces bias and makes groups more comparable. In exams connect randomisation with fairness.

Related tags

RandomisationBiasMedicineExperimental-GroupsHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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