Record Display for the EPA National Library Catalog


Main Title DISFIT: A Program for Fitting Distributions in Data.
Author Hasselblad, V. ; Stead, A. G. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1981
Report Number EPA-600/J-81-688;
Stock Number PB84-175280
Additional Subjects Statistical distributions ; Curve fitting ; Statistical data ; Binomial density functions ; Poisson density functions ; Normal density functions ; Reprints ; Computer applications ; DISFIT system ; Environmental monitoring ; Lognormal density functions ; Gamma density functions ; Beta density functions ; Maximum likelihood estimation ; Environment health
Library Call Number Additional Info Location Last
NTIS  PB84-175280 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
Although distribution fitting methods abound in the statistical literature, very few of these methods are found in the major statistical packages. In particular, SPSS (1975), BMD-P (1981) and SAS (1979) only give some overall tests for normality. There a few specialized distribution fitting packages. The distributions the authors have chosen for DISFIT include some of the classic ones as well as those pertinent to the environmental field. The analysis of both environmental monitoring and environmental health data require distribution fitting programs. The DISFIT system is written and programmed in three separate parts. The first part fits discrete distributions, and is available as a technical report (Hasselblad, Stead and Anderson, 1981). The second part fits continuous distributions. This program is available, and the report describing the program should be available by the end of 1982. The third part will fit grouped continuous distributions.