Specify the display options for Z-MR Chart

Stat > Control Charts > Variables Charts for Individuals > Z-MR > Z-MR Options > Display

Choose observations to display

To see only the most recent observations instead of all observations, enter the number of observations to include in the chart. Minitab still uses all the data to calculate the control limits and the center line.

In this example, analysts collect data each hour for one week.

By default, Minitab displays all observations.


This chart displays only the most recent number of observations that you enter. By default, Minitab displays the last 25 observations.

Split chart into a series of segments for display purposes

When you have a large number of subgroups or observations, consider splitting your control chart into segments for easier interpretation.

The below chart shows the Z-MR chart split by run.

Other display options

Select Display test results in Session window to show a text summary of the test results in the Session window. Note that you can set the chart to update automatically when the data change. Click the control chart and choose Editor > Update > Update Graph Automatically. However, the results in the Session window do not automatically update. To update the results in the Session window, you must rerun the analysis.

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