Question: An IQ test is designed so that the mean 100 and the standard deviation is 19 for the population of normal adults. Find the sample

An IQ test is designed so that the mean 100 and the standard deviation is 19 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 90% confidence that the sample mean is within 5 IQ points of the true mean

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