Example
Computing averages: {111} = 5, {112} = 2, .., {11*} = 15/3=5, {12*} = 11/3=3.67, {1**} = 45/12=3.67
Computer coefficients (ElementAvg - CoefParents): c{1**} = 3.67, c{11*} = 5 - ({1**} + {2**}) = -2.25
Compute model parameters (l-values): l{123} = c{***} + c{1**} + c{*2*} + c{**3} + c{12*} + c{1*3} + c{*23} + c{123}