PROC BOXPLOT: Summary Statistics Represented by Box Plots :: SAS/STAT(R) 9.2 User's Guide, Second Edition

The BOXPLOT Procedure

Summary Statistics Represented by Box Plots

Table 24.6 lists the summary statistics represented in each box-and-whiskers plot.

Table 24.6 Summary Statistics Represented by Box Plots
Group Summary Statistic	Feature of Box-and-Whiskers Plot
maximum	endpoint of upper whisker
third quartile ( $\text{[math]}$ th percentile)	upper edge of box
median ( $\text{[math]}$ th percentile)	line inside box
mean	symbol marker
first quartile ( $\text{[math]}$ th percentile)	lower edge of box
minimum	endpoint of lower whisker

Note that you can request different box plot styles, as discussed in the section Styles of Box Plots, and as illustrated in Example 24.2.