Five data entry operators work at the data processing department of the Birmingham Bank. Each day for 30​ days, the number of defective records in a sample of 350 records typed by these operators has been​ noted, as​ follows:                                                    Sample No. No. Defectives Sample No. No. Defectives Sample No. No. Defectives 1 8 11 7 21 16 2 5 12 5 22 11 3 19 13 15 23 6 4 10 14 3 24 6 5 10 15 12 25 13 6 7 16 7 26 11 7 11 17 12 27 15 8 9 18 3 28 6 9 7 19 18 29 12 10 12 20 16 30 4 ​a) Establish 3σ upper and lower control limits.   UCLp ​= . 055.055 ​(enter your response as a number between 0 and​ 1, rounded to three decimal​ places). LCLp ​=? ​(enter your response as a number between 0 and​ 1, rounded to three decimal​ places).

Question
1.
Five data entry operators work at the data processing department of the Birmingham Bank. Each day for 30​ days, the number of defective records in a sample of
350
records typed by these operators has been​ noted, as​ follows:
                                                  
Sample No.
No. Defectives
Sample No.
No. Defectives
Sample No.
No. Defectives
1
8
11
7
21
16
2
5
12
5
22
11
3
19
13
15
23
6
4
10
14
3
24
6
5
10
15
12
25
13
6
7
16
7
26
11
7
11
17
12
27
15
8
9
18
3
28
6
9
7
19
18
29
12
10
12
20
16
30
4
​a) Establish
upper and lower control limits.
 
UCLp
​=
. 055.055
​(enter your response as a number between 0 and​ 1, rounded to three decimal​ places).
LCLp
​=?
​(enter your response as a number between 0 and​ 1, rounded to three decimal​ places).
 
 

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