||Experimental Design Strategy for the Weibull Dose Response Model (Journal Version).
Dassel, K. A. ;
Rawlings, J. O. ;
||North Carolina State Univ. at Raleigh.;Corvallis Environmental Research Lab., OR.
Mathematical models ;
Weibull density functions ;
Farm crops ;
Experimental design ;
Agricultural economics ;
Air pollution effects(Plants) ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
The objective of the research was to determine optimum design point allocation for estimation of relative yield losses from ozone pollution when the true and fitted yield-ozone dose response relationship follows the Weibull. The optimum design is dependent on the values of the Weibull model parameters. A transformation was developed which allowed the optimum design (by the determinant criterion) for one parametric situation to be translated to any other, and permitted the search for optimum designs to be restricted to one set of Weibull parameters. Optimum designs were determined for the case where the Weibull parameters are assumed known, and effects of deviating from the optimum designs were investigated. Several alternative design strategies were considered for protecting against incorrectly guessing the Weibull model parameters when their true values are not known. (Copyright (c) 1988 Elsevier Applied Science Publishers Ltd.)