Evaluate 5.2 Problem 17
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.
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|xx||xx||p= xxxxxxx 0.5|
|xx||xx||UCL= 0.5 x 3 xxxx (0.5 X 0.5)/144=||0.5 +0.042= xxxxx|
|xx||x||xxxx 0.5-0.042 x 0.458|
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