# What is the required sample size to estimate the mean IQ score of statistics students?

An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within 4 IQ points of the true mean. Assume that mean = 12 and determine the required sample size.

n = _______ (round up to the nearest integer)

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#### Solution Summary

This solution provides step-by-step calculations for sample size, formatted in an attached Excel file.

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