the objective of this study was to classify the shoosh aquifer to several zones with different water quality in khuzestan province, iran. in this regard, the performance of classification methods (discriminant function and cluster analysis) for the classification of groundwater based on the level of pollution with an emphasis on the problem of over-fitting in training data were considered. an o...

Regression plays a central role in the discipline of statistics and is primary analytic technique many research areas. Variable selection classical major problem for regression. This article emphasizes economic aspect variable selection. The formulated terms cost predictors to be purchased future use: only subset covariates used model will need purchased. leads decision-theoretic formulation pr...