DATA VASK;
INPUT POS $  ENZYM $  DF SAK   ;
VAR = SAK/DF;
WGT = DF/2;
CARDS;
    1       A       4        2.049
    2       A       6        6.387
    3       A       8       11.297
    1       B       4        2.234
    2       B       6       11.773
    3       B       8       21.701
    1       C       4       64.954
    2       C       6       22.940
    3       C       8      104.083
    1       D       4       67.279
    2       D       6      178.197
    3       D       8      114.429
;
RUN;