Question: Management at Webster, in Problem is now concerned as to whether caulking tubes are being properly capped. If a significant proportion of the tubes are

Management at Webster, in Problem 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:

Calculate p-chart three-sigma control limits to assess whether the capping process is in statistical control.

Sample Tubes Sample Tubes Sample Tubes 15 9 4 16 3 3 109 172 4 4 2186 5 2 12192 6 4 13 520 2 14 Total72 1 Total

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