/*-----------------------------------------------------------------
            S A S   S A M P L E   L I B R A R Y                   
                                                                  
      NAME: pwrex03                                               
     TITLE: Documentation Example 3 for PROC POWER                
            (Simple AB/BA Crossover Designs)                      
   PRODUCT: STAT                                                  
    SYSTEM: ALL                                                   
      KEYS: power                                                 
            sample size                                           
            power analysis                                        
            graphs                                                
     PROCS: POWER                                                 
      DATA:                                                       
                                                                  
   SUPPORT: John Castelloe                                        
       REF:                                                       
      MISC:                                                       
-----------------------------------------------------------------*/

ods graphics on;

proc power;
   pairedmeans test=diff
      pairedmeans   = (330 310)
      pairedstddevs = (40 55)
      corr          = 0.3
      sides         = 1 2
      alpha         = 0.01
      npairs        = 100
      power         = .;
   plot x=n min=50 max=200;
run;

ods graphics off;

proc power;
   pairedmeans test=equiv_add
      lower         = -35
      upper         = 35
      pairedmeans   = (330 310)
      pairedstddevs = (40 55)
      corr          = 0.3
      alpha         = 0.01
      npairs        = 100
      power         = .;
run;