Confidence interval estimate of population mean

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Question

Part a) Given the following information X =500, σ=12, n=50

Determine the 90% confidence interval estimate of population mean.

Part b) A statistics practitioner calculated the mean and standard deviation from a sample of 51. They are X =120 and s=25.

Estimate the population mean with 90% confidence level.

Reference no: EM132286305

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