So nhom:     2 - So bien:     3
     1     8
     2    11
 Nhom    1 Tbinh       -15.25000      -14.12500      -15.25000
 Nhom    2 Tbinh        15.00000       13.81818       16.09091
 Ma tran hiep phuong sai 
 Hang   1
       11.02941       -2.72059       -2.50000
 Hang   2
       -2.72059        9.91243       -1.41578
 Hang   3
       -2.50000       -1.41578        7.67112
  Trung binh chung 
        2.26316        2.05263        2.89474
 Hang so D-Mahalanov      2483.57227
 Ham phan lop   1
Hang so    Cac he so
  1     -66.350  2      -2.815  3      -2.683  4      -3.401
 Ham phan lop   2
Hang so    Cac he so
  5     -67.730  6       2.813  7       2.667  8       3.506
 Nhom   1
    1   1       1
    2   2       1
    3   3       1
    4   4       1
    5   5       1
    6   6       1
    7   7       1
    8   8       1
 Nhom   2
    1   9       2
    2  10       2
    3  11       2
    4  12       2
    5  13       2
    6  14       2
    7  15       2
    8  16       2
    9  17       2
   10  18       2
   11  19       2