Attribute Charts Options - Stats Tab

Control Charts for Variables vs. Charts for Attributes

Select the Stats tab of the Options dialog box to access the options described here.

Relative size of margin

Select this check box to display the specified statistics and capability indices as custom text in the left margin of the graph.  

Relative size of graph

You can also specify (in percentages) the size of the margin containing the text box relative to the graph size. When you specify a small percentage, then a small (blank) margin will be created to the left of the charts in the graph. The statistics custom text will be inserted here.

Include (display) statistics in graph; for

Select which statistics to include in the statistics text box that is displayed in the left margin of the graph.

Samples (computed)

These statistics are computed from the samples. If Identify sets of samples in the chart is selected on the Layout tab, the statistics will be reported for the last set shown in the chart. Note that values computed from the samples will be different than values taken from the Specs tab. For more details, see Computation Details.

You can select Average N, Mean, and Sigma.

Samples (specs)

These statistics are taken from the specifications defined in the Specs tab of the respective results dialog. If Identify sets of samples in the chart is selected on the Layout tab, the statistics will be reported for the last set shown in the chart. To display the summary statistics for all sets, use the option Summary specifications for all sets on the Sets tab of the respective results dialog box.  

For attribute charts, you can display the Center line value, Sigma, and the Control limits.