Find the UCL and apply it to the data in Example 13.33.

Example 13.33

Regular samples of fifty are taken from a process making electronic components, for which an acceptable proportion of defectives is 5%. Successive counts of defectives in each sample are as follows:

At what point would the decision be taken to stop and correct the process?

Sample 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Count 3522 1 6442 6 74 5 5 15 16 17 8 65 97 18 19 20 9 28