A statistics practitioner took a random sample of 50 observations from a population whose standard deviation is 25 and computed...

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A statistics practitioner took a random sample of 50 observations from a population whose standard deviation is 25 and computed the sample mean to be 100. Estimate the population mean with 90% confidence.

B. Repeat part a using a 95% confidence level.

C.  Repeat part a using a 99% confidence level.

D.  Describe the effect on the confidence interval estimate of increasing the confidence level

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