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Olivia wants to learn a foreign language. To get an idea of how satisfied other...
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Olivia wants to learn a foreign language. To get an idea of how satisfied other students were after taking a foreign language course, she decides to take a random sample of 20 students. She randomly selects 5 students from French, 5 from German, 5 from Spanish, and 5 from Chinese. What type of sampling design is this approach?
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