Question

Day	Units Inspected	Units Defective
1	200	6
2	150	2
3	250	8
4	150	0
5	200	3
6	200	4
7	250	9
8	150	1
9	250	7
10	150	2
11	100	1
12	250	6
13	200	4
14	100	0
15	250	7
16	100	1
17	200	5
18	200	3
19	250	10
20	200	4
21	200	4
22	100	0
23	250	7
24	200	4
25	100	1
26	200	3
27	250	8
28	250	5
29	250	7
30	250	6

A change in equipment results in a lower defective rate at the final inspection of soup cans. thirty days of data presented in the table below. (a) Find the trial p hat and control limits for the improved process. (b) Design a control chart for future production. Explain how to do this in minitab.

Answer 1

Sol: