Management at Webster Chemical Company is 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: SAMPLE TUBES SAMPLE TUBES SAMPLE TUBES
1 2 8 4 15 5
2 4 9 5 16 8
3 6 10 5 17 3
4 1 11 1 18 7
5 5 12 4 19 8
6 8 13 5 20 3
7 6 14 2 TOTAL 92
Calculate p-chart three-sigma control limits to assess whether the capping process is in statistical control.
The UCL Subscript pUCLp equals ? and the LCL Subscript pLCLp equals ? . (Enter your responses rounded to three decimal places. If your answer for LCL Subscript pLCLp is negative, enter this value as 0.)