DATA nematod;
* data vedroerende antal nematoder
  (parasitter) i  forskellige proevevolumener
  volumener;
INPUT nr vol ant  ;
lvol = log(vol);
rate = ant/vol;
CARDS;
  1    10      11
  2    10      13
  3    10       7
  4    10       9
  5    10       9
  6    20      24
  7    20      15
  8    20      24
  9    20      15
 10    20      26
 11    40      40
 12    40      42
 13    40      35
 14    40      37
 15    40      39
;
RUN;