Discriminant Analysis - Statpower

Of course, we could generate a different
discriminant function for each group and use a
different decision rule: assign a subject to the
group whose function value is higher. Equation
(13) can be broken down into two formulae,
and
f
f
xS ′ x xS ′ x bx ′ (14)
−1 1 −1
1 = 1 −
2 1 1 = 1 + a1
x ′ S x x ′ S x b ′ x (15)
−1 1 −1
2 = 2 −
2 2 1 = 2 + a2