*Program 16-1 PROC MEANS with all the defaults;
title "PROC MEANS With All the Defaults";
proc means data=learn.blood;
run;

*Program 16-2 Adding a VAR statement and requesting specific
 statistics with PROC MEANS;
title "Selected Statistics Using PROC MEANS";
proc means data=learn.blood n nmiss mean median
                            min max maxdec=1;
   var RBC WBC;
run;

*Program 16-3 Adding a BY statement to PROC MEANS;
proc sort data=learn.blood out=blood;
   by Gender;
run;

title "Adding a BY Statement to PROC MEANS";
proc means data=learn.blood n nmiss mean median
                            min max maxdec=1;
   by Gender;
   var RBC WBC;
run;

*Program 16-4 Using a CLASS statement with PROC MEANS;
title "Using a CLASS Statement with PROC MEANS";
proc means data=learn.blood n nmiss mean median
                            min max maxdec=1;
   class Gender;
   var RBC WBC;
run;

*Program 16-5 Demonstrating the effect of a formatted CLASS variable;
proc format;
   value chol_group
     low -< 200 = 'Low'
     200 - high = 'High';
run;

proc means data=learn.blood n nmiss mean median
           maxdec=1;
   title "Using a CLASS Statement with PROC MEANS";
   class Chol;
   format Chol chol_group.;
   var RBC WBC;
run;