A box-and-whisker plot (or a box plot) is a histogram-like method of displaying data. The plot shows boxes to represent the quartile ranges, and whiskers (single lines) to the farthest points that are not outliers.
To add a box and whisker layer to a number line graph:
Insert a number line graph or edit an existing graph by double-clicking it. The Number Line Graph dialog box opens.
In the Layers section, click Add.
Select Box and Whisker in the Add Number Line Layer dialog box and then click OK.
Enter values for the Lower Extreme, Lower Quartile, Median, Upper Quartile, and Upper Extreme.
Enter an optional Label.
Note: You can format the text using HTML text.
Select a Color for the graph.
If you want the layer to display only if a certain condition is met, enter an equation or a variable that evaluates to true or false into the Show if field.
Note: When entering variables, enclose the variable name in two opening and two closing number signs (for example, ##var1## = 3). The variable you reference must be defined for the question or the preface associated with the question.
Click OK.