Please type all answers and attach control charts ONLY without data sheets.

1. Patients complaints about long wait times have historically been a major problem in an outpatient center. As an administrator, you decided to use SPC tools to reduce wait times. Every day, you measured wait times of 4 randomly-selected patients over a period of 25 days. Measurements in minutes are shown in the following table. Use MS Excel to construct appropriate control charts and specify the control limits including 1-sigma and 2-sigma limits. Circle out-of-control points based on the Detection Rules.

Day	1	2	3	4	Day	1	2	3	4
1	8	15	12	9	14	17	14	16	10
2	15	7	11	22	15	24	11	8	19
3	15	7	10	10	16	17	12	10	18
4	7	28	17	13	17	25	7	9	15
5	11	13	9	8	18	20	10	18	10
6	22	15	35	10	19	30	14	17	15
7	7	6	8	10	20	10	14	15	20
8	28	21	10	24	21	20	11	8	17
9	11	8	12	8	22	24	7	6	10
10	1	7	6	17	23	15	7	12	13
11	5	9	12	11	24	7	2	15	13
12	16	25	31	21	25	14	8	9	17
13	7	14	7	16