The number of staff personnel needed to handle patients at a medical center is determined by the mean time that patients must wait before being attended to by a physician. For a random sample of 100 previously recorded emergencies, the sample mean waiting time was 72 minutes, with a standard deviation of 28 minutes.
a. what is a 50 percent confidence interval for the actual mean waiting time?
b. what is a 99 percent confidence interval for the actual mean waiting time?© BrainMass Inc. brainmass.com June 4, 2020, 2:13 am ad1c9bdddf
Please refer attached file for complete solution. Expressions typed with the help of equation writer are missing here.
a. What is a 50 percent confidence interval for the actual mean waiting time?
Sample mean=72 minutes
Sample standard deviation=s=28 minutes
Sample size=n= 100
Since sample size is greater than ...
Solution describes the steps to estimate the confidence interval for the actual mean.