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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 0 =

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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 0 = 8.5. You would like to be 85% confident that your estimate is within 0.25 of the true population mean. How large of a sample size is required? 0 2301 O 2388 O 2402 O 2398

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