Question: Problem 10-23 (Algo) Ten samples of 15 parts each were taken from an ongoing process to establish a p -chart for control. The samples and

Problem 10-23 (Algo)

Ten samples of 15 parts each were taken from an ongoing process to establish a p-chart for control. The samples and the number of defectives in each are shown in the following table:

SAMPLE n NUMBER OF DEFECTIVE ITEMS IN THE SAMPLE
1 15 3
2 15 3
3 15 1
4 15 2
5 15 0
6 15 3
7 15 3
8 15 2
9 15 0
10 15 3

a. Determine the pp , Sp, UCL and LCL for a p-chart of 95 percent confidence (1.96 standard deviations). (Leave no cells blank - be certain to enter "0" wherever required. Round your answers to 3 decimal places.)

b. What comments can you make about the process?

  • Process is out of statistical control.

  • Process is in statistical control.

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