Soap Cube Prewt Postwt WtLoss
         1    1   13.14  13.44  -0.30
         1    2   13.17  13.27  -0.10
         1    3   13.17  13.31  -0.14
         1    4   13.17  12.77   0.40
         2    5   13.03  10.40   2.63
         2    6   13.18  10.57   2.61
         2    7   13.12  10.71   2.41
         2    8   13.19  10.04   3.15
         3    9   13.14  11.28   1.86
         3   10   13.19  11.16   2.03
         3   11   13.06  10.80   2.26
         3   12   13.00  11.18   1.82