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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately=68.2 . You

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately=68.2

. You would like to be 90% confident that your estimate is within 0.1 of the true population mean. How large of a sample size is required?

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