The XCHART statement creates an ANOM chart for group (treatment level) means of response values. You can use options in the XCHART statement to

• compute decision limits from the data based on 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

• add block legends and symbol markers to identify special groups

• superimpose stars at points to represent related multivariate factors

• 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 charts with the XCHART 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.