Southside Hospitalin Bay Shore Assignment

SouthsideHospitalin Bay Shore, New York, commonly conducts stress tests to study the heart muscle after a person has a heart attack. Members of the diagnostic imaging department conducted a quality improvement project with the objective of reducing the turnaround time for stress tests. Turnaround time is defined as the time from when a test is ordered to when the radiologist signs off on the test results. Initially, the mean turnaround time for stress test was 68 hours.

After incorporating changes into the stress-test process, thequality improvement team collected a sample of 50 turnaround times. In thissample, the mean turnaround time was 32 hours, with a standard deviation of 9hours. (Data extracted from E. Godin, D.Raven, C. Sweetapple, and F. R. Del Guidice, “Faster Test Results,” Quality Progress, January 2004, 37(1), pp. 33–39.)

a. Ifyou test the null hypothesis at the 0.01 level of significance, is thereevidence that the new process has reduced turnaround time?

b. Interpretthe meaning of the p-value in this problem

 

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