A hospital is trying to cut down on emergency room wait times. It is interested

Question

A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being called back to be examined. An investigation committee randomly surveyed 70 patients. The sample mean was 1.5 hours with a sample standard deviation of 0.5 hours.

Calculate a 99% confidence interval for the population mean time spent waiting. The lower bound for the 99% confidence interval is (state your answer rounded to three decimal places) - and the upper bound for the 99% confidence interval is (state your answer rounded to three decimal places) -

Explanation / Answer

The statistical software output for this problem is:

One sample T summary confidence interval:
: Mean of population

99% confidence interval results:

Hence,

99% confidence interval will be:

Lower bound = 1.342

Upper bound = 1.658

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