An IQ test is designed to have scores that have a standard deviation of = 15.

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An IQ test is designed to have scores that have a standard deviation of σ = 15.

A simple random sample of students at a large university will be given the test in order to construct a 98% confidence interval for the mean IQ of all students at the university. How many students must be tested so that the margin of error will be equal to 3 points?

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Elementary Statistics

ISBN: 9781259969454

3rd Edition

Authors: William Navidi, Barry Monk

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