If you include a PLOT statement, the GLMPOWER and POWER procedures produce standard power curves, representing any multi-valued input parameters with varying line styles, symbols, colors, and/or panels. The Power and Sample Size application also has an option to produce power curves.

To display default power curves for the preceding PROC POWER call, simply add the PLOT statement with no arguments as follows:

   proc power plotonly;
      twosamplemeans test=diff
         meandiff = 5 6
         stddev = 12 18
         alpha = 0.05 0.1
         ntotal = 100 200
         power = .;
      plot;
   run;

Figure 19.2 shows the results. Note that the line style varies by the significance level , the symbol varies by the mean difference, and the panel varies by standard deviation.

Figure 19.2 PROC POWER Default Graphical Output