* SAS code for Salmonella data from Table 4.4;
 options linesize=70;

 data sal44;
      * do-loop to set up control group;
  do i=1 to 3; input count @@;  group=0; output;
  end;
      * do-loop to set up exposure group;
    do i=1 to 3; input count @@;  group=1; output;
    end;
 cards;
 46 43 44
 67 77 78

 proc print;  *check output/do-loop operation;

 proc npar1way;
   class group;
   var count;

 run;