ou want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=31.6σ=31.6. You would like to be 90% confident that your estimate is within 3 of the true population mean. How large of a sample size is required? Do not round mid-calculation.

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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 σ=31.6σ=31.6. You would like to be 90% confident that your estimate is within 3 of the true population mean. How large of a sample size is required? Do not round mid-calculation.

n = 

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