Everyone welcome to this activity solutions lecture. Please copy and paste the data on Minitab choose stat, control charts, attributes charts, you I repeat, to stat, control charts, attributes charts, you in variables enter total number of imperfections. In subgroup sizes, enter number of phones tested. Click you chart options then click the tests tab. Choose perform all tests for special causes. Then, click OK in each dialog box, here you go.

This is your chart. As you can see the process is in a state of statistical control. Fantastic Take