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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|4x||x||xx xxxxxxx 0.5|
|xxx||1||UCL= xxx x x xxxx xxxx x 0.5)/144=x||xxx +0.042= xxxxx|
|xxx||xx||LCL= 0.5-0.042 x xxxxx|
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