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Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:

Student # 1 2 3 4 5 6 7 8 9 10
Hours Studied 10 15 20 5 0 18 12 18 7 15

For this sample, compute PXi, the sample average (X), P(Xi¡X)2, and the sample standard deviation (s).

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Category:- Statistics and Probability
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