(* Mass of 19 Pigs *)

colname={group1,group2,group3,group4};



data = {{65.2, 58.4, 49.0, 70.1, 54.4}, {74.2, 68.0, 61.1, 61.7, 62.6}, {95.0,

         91.2, 98.6, 97.7}, {75.1, 91.8, 79.4, 91.0, 93.7}};