Main Title |
Ames Test Curve Fitting Program. A User's Guide. |
Author |
Hasselbald, Vic ;
Stead, Andy ;
Creason, John ;
Kasica, Violette ;
|
CORP Author |
Health Effects Research Lab., Research Triangle Park, NC. |
Year Published |
1980 |
Report Number |
EPA-600/2-80-184; |
Stock Number |
PB81-156267 |
Additional Subjects |
Curve fitting ;
Computer programs ;
Statistical analysis ;
Programming manuals ;
Fortran ;
Maximum likelihood estimation ;
UNIVAC-1110 computers ;
Parameter estimation ;
Goodness of fit tests ;
Likelihood ratio tests
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB81-156267 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
60p |
Abstract |
The Ames Test Curve Fitting program is a Fortran program which fits a nonlinear dose-response curve to count (Poisson) data. The program was written specifically for analyzing Ames test data, although it is possible that the program could have other applications. The curve fitted is of the form (a+exp(b+clogX)exp(-dx)) where a, b, c and d are parameters to be estimated. If the parameter d is very near zero, then d is dropped from the model, and a reduced model is fitted. Tests of goodness-of-fit and for the significance of the parameters are made using likelihood ratio tests. The program has optional graphics capability for producing plots of the data and the estimated curve. |
PUB Date Free Form |
Sep 80 |
Category Codes |
9B; 12A; 62B; 72F |
NTIS Prices |
PC A04/MF A01 |
Primary Description |
600/11 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
323792115 |
Origin |
NTIS |
Type |
CAT |