Record Display for the EPA National Library Catalog


Main Title Method for Testing Whether Model Predictions Fall within a Prescribed Factor of True Values, with an Application to Pesticide Leaching.
Author Parrish, R. S. ; Smith., C. N. ;
CORP Author Environmental Research Lab., Athens, GA. ;Computer Sciences Corp., Athens, GA.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/204;
Stock Number PB91-116145
Additional Subjects Error analysis ; Pesticides ; Soil profiles ; Mobility ; Multivariate analysis ; Georgia ; Field tests ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-116145 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
A quantitative method is described for testing whether model predictions fall within a specified factor of true values. The technique is based on classical theory for confidence regions on unknown population parameters and can be related to hypothesis testing in both univariate and multivariate situations. A capability index is defined that can be used as a measure of predictive capability of a model, and its properties are discussed. The testing approach and the capability index should facilitate model validation efforts and permit comparisons among competing models. An example is given for a pesticide leaching model that predicts chemical concentrations in the soil profile. (Copyright (c) 1990 Elsevier Science Publishers B.V.)