I have added this data on a spreadsheet and uploaded it in the resources section of this lecture. Please feel free to download the data and paste it on Minitab to stat, control charts, variable chart for subgroups. x bar, I repeat to stat, control charts, variables chart for subgroups x bar. Choose all observations for a chart or in one column. Enter high voltage power supply in subgroup sizes into four. Click x bar 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 the x bar our chart. Let's talk about its influence.

Now, you will observe that there are two charts, one is the sample mean. And the second is the sample range chart. The data points of both these charts are well within control limits, indicating that they are within a state of statistical control. That brings us to the end of this lecture. You will now go through an activity