Olivia uses a random number generator to select 40 students from all students taking a foreign language class this year. Her sampling method is a: Convenience Sample Simple Random Sample Voluntary Response Sample You are designing a clinical trial to see whether adding calcium to the diets of middle-aged men will reduce their blood pressure. The researchers assigned numbers to prospective subjects and then used a random number generator to select the participants of the study. This is called: Random selection The double-blind technique Random assignment
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