Question: Using the same survey methodology: random sample of US residents between the ages of 18 to 75 who registered on the Crest website as a

Using the same survey methodology: random sample of US residents between the ages of 18 to 75 who registered on the Crest website as a product, Crest wants to divide the research population into heterogeneous groups based on age and gender and then draw a random sample from each of the different groups. Based on this information, what type of sampling method would Crest use to conduct this survey? There are two major types of sample plans: and

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