data sasuser.mean_y;

array y(32) y1-y32;

do sample=1 to 1000;



   do i = 1 to 32; y(i) = 1+ 2.5*rangam(0,4.0); end;



   mean_2y =  sum(y1,y2)/2;

   mean_3y =  sum(y3,y4,y5)/3;

   mean_4y =  sum(y6,y7,y8,y9)/4;

   mean_5y =  sum(y10,y11,y12,y13,y14)/5;

   mean_6y =  sum(y15,y16,y17,y18,y19,y20)/6;

   mean_12y = sum(y21,y22,y23,y24,y25,y26,y27,y28,y29,y30,y31,y32)/12;

   output;

end;



run;