Statistical Methods in Medical Research 4ed

Table 13.3 Concentration of haemoglobin and bilirubin for infants with haemolytic disease of the
newborn (x, haemoglobin (g/100 ml); y, bilirubin (mg/100 ml)).
Survivals (n ˆ 63)
x y x y x y x y
18 7 2 2 15 8 3 7 14 3 3 3 11 8 4 5
17 8 2 7 15 8 3 0 14 1 3 7 11 6 3 7
17 8 2 5 15 8 1 7 14 0 5 8 10 9 3 5
17 6 4 1 15 6 1 4 13 9 2 9 10 9 4 1
17 6 3 2 15 6 2 0 13 8 3 7 10 9 1 5
17 6 1 0 15 6 1 6 13 6 2 3 10 8 3 3
17 5 1 6 15 4 4 1 13 5 2 1 10 6 3 4
17 4 1 8 15 4 2 2 13 4 2 3 10 5 6 3
17 4 2 4 15 3 2 0 13 3 1 8 10 2 3 3
17 0 0 4 15 1 3 2 12 5 4 5 9 9 4 0
17 0 1 6 14 8 1 8 12 3 5 0 9 8 4 2
16 6 3 6 14 7 3 7 12 2 3 5 9 7 4 9
16 3 4 1 14 7 3 0 12 2 2 4 8 7 5 5
16 1 2 0 14 6 5 0 12 0 2 8 7 4 3 0
16 0 2 6 14 3 3 8 12 0 3 5 5 7 4 6
16 0 0 8 14 3 4 2 11 8 2 3
Deaths (n ˆ 16)
Sums of squares and products within groups
x y x y
15 8 1 8 7 1 5 6
12 3 5 6 6 7 5 9
9 5 3 6 5 7 6 2
9 4 3 8 5 5 4 8
9 2 5 6 5 3 4 8
8 8 5 6 5 3 2 8
7 6 4 7 5 1 5 8
7 4 6 8 3 4 3 9
124 1 77 3
Sxx Sxy Syy
Survivals 500 6593 108 4219 96 6943
Deaths 143 3794 21 3281 26 9744
Pooled 644 0387 129 7500 123 6687
Var./cov. 8 3641 1 6851 1 6061
13.3 Discriminant analysis 469
875 5 194 7