Random samples of size n=500 are taken from a population with p=0.34.

a. Construct the centerline and the upper and lower control limits for the p chart.

b. Suppose six samples of size 500 produced the following sample proportions: 0.28, 0.30, 0.33, 0.34, 0.37, and 0.39.

Plot these values on the p chart.

c. Are any points outside the control limits? Does it appear that the process is under control? Explain.