OPTIONS LS=72;         
DATA G;                
INPUT GROUP $ COUNT;   
CARDS;                 
D 18                   
D 43                   
D 28                   
D 50                   
D 16                   
D 32                            
D 13                            
U 40                            
U 54                            
U 26                            
U 63                            
U 21                            
U 37                            
U 39                            
;
PROC PRINT;                     
                                
PROC TTEST;                     
   CLASS GROUP;                 
   VAR COUNT;                   
                                
PROC NPAR1WAY WILCOXON MEDIAN;  
   CLASS GROUP;                 
   VAR COUNT;                   
run;