Question: A statistics practitioner took a random sample of 47 observations from a population whose standard deviation is 30 and computed the sample mean to be

A statistics practitioner took a random sample of 47 observations from a population whose standard deviation is 30 and computed the sample mean to be 96.

Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits.

A. Estimate the population mean with 95% confidence.

Confidence Interval =

B. Estimate the population mean with 90% confidence.

Confidence Interval =

C. Estimate the population mean with 99% confidence.

Confidence Interval =

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