Suppose that the average waiting time for a patient at a physician's office is just over 29 minutes. To address the issue of long patient wait times, some physicians' offices are using wait-tracking systems to notify patients of expected wait times. Patients can adjust their arrival times based on this information and spend less time in waiting rooms. The data listed in the 'PatientWaits.xls' show wait times (in minutes) for a sample of patients at office that do not have a wait-tracking system and wait times for a sample of patients at offices with such systems.

? What are the mean and median patient wait times for offices with and without a wait-tracking system, respectively?

? What are the variance and standard deviation of patient wait times for office with and without a waittracking system, respectively?

? Do offices with a wait-tracking system have shorter patient wait time than offices without a wait-tracking system? Explain.