The data of Exercise 15.19 may be looked upon as evidence that the standard of \(4 \%\) defectives is being exceeded.

(a) Use the data of Exercise 15.19 to construct new control limits for the fraction defective.

(b) Using the limits found in part (a), continue the control of the process by plotting the following data on the next ten samples of size n=200: 8, 6, 4, 2, 3, 5,10, 9,1,8.

Data From Exercise 15.19

Transcribed Image Text:

15.19 Twenty-five successive samples of 200 propellers, each taken from a production line, contained, respectively, 1, 8, 4, 6, 10, 7, 9, 5, 1, 0, 4, 8, 10, 3, 12, 5, 9, 16, 13, 7, 8, 4, 2, 9 and 2 defectives. If the fraction of defectives is to be maintained at 0.04, construct a p chart for these data and state whether or not this standard is being met.