The BOXCHART statement creates an ANOM chart for group (treatment level) means of response values superimposed with box-and-whisker plots of the measurements in each group. Throughout this chapter, a chart of this type is referred to as an ANOM boxchart. You can use options in the BOXCHART statement to

• compute decision limits from the data based on a specified parameters, such as the significance level ()

• tabulate group sample sizes, group means, decision limits, and other information

• save decision limits in an output data set

• save group sample sizes and group means in an output data set

• read decision limits and decision limit parameters from a data set

• display distinct sets of decision limits for different sets of groups

• specify one of several methods for calculating quantile statistics (percentiles)

• control the style of the box-and-whisker plots

• add block legends and symbol markers to identify special groups

• clip extreme points to make the chart more readable

• display vertical and horizontal reference lines

• control axis values and labels

• control layout and appearance of the chart

You have two alternatives for producing ANOM boxcharts with the BOXCHART statement:

• Traditional graphics are produced by default.

• ODS Graphics output is produced when you specify the ODS GRAPHICS statement prior to the PROC ANOM statement.

See Chapter 3, SAS/QC Graphics, for more information about producing these different kinds of graphs.