SOLUTION: 200 laboratory sample orders were reviewed and it was determined that the mean turnaround time was 55.6 minutes for reporting the results to the physician. The turnaround times wer

Question 1086418: 200 laboratory sample orders were reviewed and it was determined that the mean turnaround time was 55.6 minutes for reporting the results to the physician. The turnaround times were normally distributed and showed a sample standard deviation of 5.2 minutes. The researcher s would like to construct a 90% confidence interval.
Calculate the 90% confidence interval:
Present in this format:
____<<____

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
200 laboratory sample orders were reviewed and it was determined that the mean turnaround time was 55.6 minutes for reporting the results to the physician.
The turnaround times were normally distributed and showed a sample standard deviation of 5.2 minutes. The researchers would like to construct a 90% confidence interval.
Sample mean = 55.6 ; Std = 5.2
ME = 1.645*5.2/sqrt(200) = 0.605
Calculate the 90% confidence interval:
5.2-0.605 < u < 5.2+0.605
4.60 < u < 5.81
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Cheers,
Stan H.
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