Estimate the population mean

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Question -

Part a) The mean of a sample of 25 observations was calculated as 500. The sample was randomly drawn from a normal population whose standard deviation is 15. Estimate the population mean with 95% confidence.

Part b) The following sample of 16 measurements was selected from a population that is approximately normally distributed.

61 85 92 77 83 81 75 78 95 87 69 74 76 84 80 83

Construct a 90% confidence interval for the population mean.

Reference no: EM133155138

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