Mathematics, 29.01.2020 14:00 alekvtaylor

Apopulation of middle school students contains 160 sixth graders, 180 seventh graders, and 140 eighth graders. nine seventh graders were part of a random sample of the population chosen to participate in a survey. for the sample to accurately represent the population, about how many sixth graders should be chosen?

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16

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Apopulation of middle school students contains 160 sixth graders, 180 seventh graders, and 140 eight...