Graphs - Categorized Graphs - Box Plots

Select Box Plots from the Graphs - Categorized Graphs menu to display the Categorized Box Plots dialog. When you create categorized box plots, a series of standard 2D box plots, one for each category of cases identified by the X or X and Y category variables (or identified by the multiple subset criteria) is produced.

The categorized box and whisker plot typically summarizes the distribution of a variable broken down (categorized) by some other grouping or independent variable(s), by three components:

1. A central line to indicate central tendency or location;

2. A box to indicate variability around this central tendency;

3. Whiskers around the box to indicate the range of the variable (or another measure of variability).

One, two, or three grouping variables can be represented on one graph (i.e., a graph can represent a one-way, two-way, or three-way categorization of cases). If two or three grouping variables are selected, a "crosstabulation of graphs" is produced. These graphs allow the user to plot multiple dependent variables in one graph, support different graph layout formats, and offer a selection of categorization methods (including user-defined intervals, multiple subsets defined by logical expressions, and others).