Question: Please, attach ONE Excel file with solutions to ALL exercises for this assignment (you cannot submit a separate Excel file for each exercise - it

Please, attachONEExcel file with solutions toALLexercises for this assignment (you cannot submit a separate Excel file for each exercise - it should be one Excel file which contains solutions to all exercises!).

(please use a link to send the Excel file to me)

Aetna, a major health insurance company, would like to estimate the average wait time for a patient seeking emergency room services. A random sample of 33 emergency room patients had an average wait time of 222 minutes with a sample standard deviation of 76 minutes. Determine the confidence interval to estimate the average wait time for the following confidence levels:

90%

95%

99%

How does the confidence level impact the precision of the estimate?

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