Categorized Normal Probability Plots - Quick Tab

Graphical Analytic Techniques

Select the Quick tab of the Categorized Normal Probability Plots dialog to specify categorized normal probability plots quickly using the default method of categorization (select the Advanced tab for more options).

Layout. Choose either a Separate plot layout (where each subset of cases is displayed in a separate small graph) or an Overlaid plot layout (where all subsets are overlaid in one graph and identified only by patterns and colors) for the categorized plots.

Variables. Click the Variables button to display the standard variable selection dialog, in which you can select the X and (optional) Y grouping variables and the variable(s) to be displayed in the probability plots. If more than one dependent variable is selected, then a sequence of graphs (one for each dependent variable) will be produced using the same set of grouping variables. The selection that you make will then be displayed in the area of the dialog below the Variables button.

Note that the selected grouping variables do not have to be categorical variables (e.g., contain codes); you can use one of the methods of categorization (on the Advanced tab) to categorize continuous variables. The selection of grouping variables is not necessary if the categories are defined via the Multiple Subsets method.

Graph type. Select the type of probability plot to be plotted from the Graph type list. Click the plot link listed below for a brief description of that type of graph.

Do not assign average ranks to tied observations. This check box is selected by default, which allows you to see all data points, even the ties. With the check box cleared, the "tied" points will overlap.