Question: Please help answer five We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation

Please help answer five

We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately cr = 25.1. We would like to be 99.5% confident that the esimate is within 2 of the true population mean. How large of a sample size is required? n=l:]

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