target variable (steel price) movement. A generalized reduced gradient algorithm (GRG) method is employed to estimate the … comparisons are made. The study finds that the combining model formed with the gradient algorithm approach in which the weights … generated by a constrained generalized reduced gradient algorithm (GRG) method. …

of squares of main effects and their interactions. Secondly, we prove that SS regression and SS linear are equivalent …

In many regression applications, users are often faced with difficulties due to nonlinear relationships, heterogeneous … subjects, or time series which are best represented by splines. In such applications, two or more regression functions are … priori which subset of observations should be approximated with which specific regression function. This paper presents a …