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Management at Webster in Problem 16 is now concerned as to whether caulking tubes are being properly capped. If a significant proportion of the tubes are not being sealed Webster is placing its customers in a messy situation. Tubes are packaged in large boxes of 144. Several boxes are inspected and the following numbers of leaking tubes are found (see attached table).
Calculate p-chart three sigma control limits to assess whether the capping process is in statistical control.
1
3
8
6
15
52
5
9
4
16
03
3
10
9
17
24
4
11
2
18
65
2
12
6
19
26
4
13
5
20
17
2
14
1
72Sample
Tubes
Sample
Total

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