J. McWilliams Swim Club is trying to calibrate their chlorine pump to ensure that the right amount of chlorine (1.0–1.5 ppm of free chlorine) mixed into the water.

J. McWilliams Swim Club

Sample		DATA
1	1.22	1.32	1.21	1.35
2	1.36	1.32	1.31	1.37
3	1.22	1.25	1.33	1.28
4	1.26	1.25	1.22	1.21
5	1.29	1.23	1.34	1.15
6	1.31	1.25	1.24	1.26
7	1.24	1.26	1.24	1.18
8	1.28	1.26	1.19	1.29
9	1.28	1.22	1.27	1.20
10	1.14	1.19	1.18	1.15
11	1.20	1.21	1.20	1.21
12	1.25	1.17	1.20	1.24
13	1.26	1.25	1.30	1.22
14	1.24	1.19	1.22	1.21
15	1.36	1.18	1.36	1.16
16	1.25	1.15	1.29	1.15
17	1.30	1.32	1.29	1.23
18	1.29	1.34	1.20	1.37
19	1.20	1.24	1.14	1.23
20	1.26	1.28	1.25	1.29
21	1.17	1.30	1.15	1.30
22	1.28	1.25	1.21	1.26
23	1.19	1.16	1.25	1.27
24	1.23	1.24	1.23	1.22
25	1.22	1.23	1.26	1.23
26	1.24	1.25	1.16	1.20
27	1.32	1.19	1.25	1.19
28	1.25	1.21	1.21	1.22
29	1.17	1.17	1.29	1.29
30	1.14	1.14	1.35	1.24

Transcribed Image Text:

J. McWilliams Swim Club is trying to calibrate their chlorine pump to ensure that the right amount of chlorine (1.0-1.5 ppm of free chlorine) is mixed into the water. Thirty samples of four readings at random times during the week were taken. These data can be found in the worksheet Prob07-02 in the Ch07Data.xlsx file. a. Compute the mean and range of each sample, calculate control limits, and plot them on x and R control charts. b. Does the process appear to be in statistical control? Calculate descriptive statistics that may help you to determine the answer to this question. What evidence is there for your conclusion? J. McWilliams Swim Club is trying to calibrate their chlorine pump to ensure that the right amount of chlorine (1.0-1.5 ppm of free chlorine) is mixed into the water. Thirty samples of four readings at random times during the week were taken. These data can be found in the worksheet Prob07-02 in the Ch07Data.xlsx file. a. Compute the mean and range of each sample, calculate control limits, and plot them on x and R control charts. b. Does the process appear to be in statistical control? Calculate descriptive statistics that may help you to determine the answer to this question. What evidence is there for your conclusion?

Answer rating: 100% (QA)

The following control charts were constructed using the given sample data By looking at the control ... View the full answer