Assume Xi is distributed normal, with mean 25, standard deviation 2. Assume a random sample of 25

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Assume Xi is distributed normal, with mean 25, standard deviation 2. Assume a random sample of 25 independent X _i's was taken.

(a) Find the expected value and the standard deviation of the sample average.

(b) Find the expected value and the standard deviation of the total.

(d) Explain intuitively why the standard deviation from (b) is larger than the standard deviation of Xi.

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Introductory Statistics

ISBN: 978-0470904107

8th edition

Authors: Prem S. Mann

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Posted Date: May 03, 2019 10:06 AM

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Assume Xi is distributed normal, with mean 25, standard deviation 2. Assume a random sample of 25

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a The sampling distribution of sample mean will be a... View the full answer

Introductory Statistics

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