The director of radiology at a large metropolitan hospital has the business objective of improving the scheduling in the radiology facilities. On a typical day, 250 patients are transported to the radiology department for treatment or diagnostic procedures. If patients do not reach the radiology unit at their scheduled times, backups occur, and other patients experience delays. The time it takes to transport patients to the radiology unit is operationally defined as the time between when the transporter is assigned to the patient and when the patient arrives at the radiology unit. A sample of n = 4 patients was selected each day for 20 days, and the time to transport each patient (in minutes) was determined, with the results stored in Transport.
a. Construct control charts for the range and the mean.
b. Is the process in control?
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