options ls=75 nodate;

data soybeans;
   length density $6;
   length treatment $9;
   length variety $7;
   input variety $ density $ treatment $ yield;
   cards;
Akona      low        control        7.7
Akona      medium     sprinkler     13.5
Akona      high       furrow         4.3
Porgate    low        furrow        10.4
Porgate    medium     control        9.8
Porgate    high       sprinkler     12.3
Clark62    low        sprinkler     17.0
Clark62    medium     furrow         8.2
Clark62    high       control        7.7
;
proc print;
  title "ST512, Exam 3, Problem 1, Fall 2004";
run;