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I am looking for help with the following question: In order to test whether students in...

I am looking for help with the following question: In order to test whether students in a large State University have a certain genetic trait, an elaborate instrument has to be set up but the cost of testing additional subjects is not that expensive once the instrument is set up. From last year’s data, the proportion of students having that genetic trait was 0.28. To estimate this year’s proportion to within 0.02 by a 95% confidence interval, how many students would you sample? Decide whether to use the educated guess method or the conservative method and then provide the sample size.

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Answer #1

Use conservative (formula) method to decide sample size

Given, The proportion of students having the genetic trait p-0.28 Margin of Error, E 0.02 Confidence level 95% 95% confidence

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