proc means data=sashelp.class noprint;
  var age;
  output out=Stats(drop=_FREQ_ _TYPE_) mean=AvgAge;
run;
data differences_dstep(keep=Name Age AvgAge AgeDiff);
  if _n_=1 then set Stats;
  set sashelp.class;
  AgeDiff=Age-AvgAge;
run;
proc print data=differences_dstep;
  title1 "Differences from the average";
run;