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In one study, the Educational Testing Service (ETS) needed a representative sample of college students. They...

In one study, the Educational Testing Service (ETS) needed a representative sample of college students. They first divided all colleges and universities into smaller groups (e.g. one group of large public universities, another group of small private universities, etc.) They then used their judgment to select one representative school from each group. Each school in the sample was then asked to select a sample of students. Was this a good way to get a representative sample of students? Explain.

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