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A researcher wants to study the effect of sleep on test performance. They recruit 100 students and flip a coin for each to assign them to either '8 hours of sleep' or '4 hours of sleep'. What is this process called?
A researcher wants to study the effect of sleep on test performance. They recruit 100 students and flip a coin for each to assign them to either '8 hours of sleep' or '4 hours of sleep'. What is this process called?