2. To monitor performance, the radiology department at Guelph General Hospital is interested in setting standards for the time patients spend waiting when brought in for x rays from the emergency department. They want to track performance and are proposing setting up process control chart(s) for wait times. They tracked six different patients for five days and the data is presented below. The time is in minutes spent waiting.

Day	1	2	3	4	5	6
Monday	14	13	20	18	17	21
Tuesday	22	21	18	17	18	17
Wednesday	16	14	17	20	15	22
Thursday	13	19	20	21	14	18
Friday	15	16	18	21	17	22

a) Calculate the appropriate upper and lower control limits for the average time spent waiting.

b) Is the process currently in control?

c) The hospital hired a new tech and their wait times for 3 days are evaluated? Is the new tech doing a job consistent with that of the others?

Day	1	2	3	4	5	6
Monday	18	24	21	24	23	26
Tuesday	14	20	21	22	21	19
Wednesday	13	14	16	19	15	20