Evaluation function (II): Multivalued Ag

Evaluation function (II): Multivalued Ag for a multivalued target variable A_g with values x_i:

T_i = {t in ro | t[A_g] = x_i}

A subgroup h is considered "unusual" if

2. the distribution of T_i in c(h) is significantly different from the distribution in r_o

Evaluating unusualness:
Let p_i0:=| T_i|/| r₀ |, p_i := | c(h) Ç T_i | / | c(h) |, g = |c(h) / | r₀|
d(h) := g * S_i=1..n(p_i-p_i0)^2 (0 if g < s₀)