Creating the Plant_Stat Data Set

data plant_stats;
  do month = 1 to 12;
    age  = 2 + 0.3*rannor(345467);
    age2 = 3 + 0.3*rannor(345467);
    age3 = 4 + 0.4*rannor(345467);
    output;
  end;
run;