Question: The quality controller selects each time a sample of 10 board glasses and count the number of scratches sample Number of Scratches 1 4 2

The quality controller selects each time a sample of 10 board glasses and count the number of scratches

sample Number of Scratches
1 4
2 3
3 5
4 4
5 4
6 4
7 3
8 2
9 4
10 5
11 5
12 0
13 3
14 4
15 0
16 3
17 2
18 2
19 1
20 5
21 4
22 5
23 5
24 2
25 2
26 1
27 1
28 0
29 0
30 5
31 4
32 3
33 4
34 5
35 5
36 0
37 3
38 2
39 1
40 0

Q) by Excel sheet:

a) calculations of UCL, CL and LCL

b) control chart

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