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A researcher wants to compare student loan debt for students who attend? four-year public universities with those who attend? four-year private universities. She plans to take a random sample of 100 recent graduates of public universities and 100 recent graduates of private universities. Which type of random sampling is utilized in her study? design?

Choose the correct answer below.

A. A simple random sample because she randomly samples people from one group.

B. A stratified sample because the population is divided into separate groups and each group is randomly sampled.

C. A cluster sample because the population is divided into separate clusters and each cluster is randomly sampled.

D. A stratified sample because the population is divided into separate groups and all subjects from a randomly selected group are sampled.

E. A cluster sample because the population is divided into separate? groups, or? clusters, and all subjects from a randomly selected cluster? (or sample of? clusters) are selected.

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