Using the data from Problem 26 continues your analysis of sample size and frequency by trying the following plans.
a. Using the x-chart for n = 4, try the frequency sample four then skip eight. When would you stop the process in this case?
b. Using the x-chart for n = 8, try the frequency sample eight then skip eight. When would you consider the process to be out of control?
c. Using your results from parts (a) and (b), determine what trade-offs you would consider in choosing between them.