Question: When a study uses - , each member of a population has an equal chance of being selected. - occurs when researchers randomly sample subsets

When a study uses - , each member of a population has an equal chance of being selected. - occurs when researchers randomly sample subsets of the population and then use all individuals within the subsets. - is often used to select participants to represent, in an unbiased way, subsets of the population that are not large enough to be accurately measured. All three of these techniques are - sampling techniques

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