Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Advantages of Using Regression Analysis to Calculate Results of Chronic Toxicity Tests.
Author Stephan, C. E. ; Rogers, J. W. ;
CORP Author Environmental Research Lab.-Duluth, MN. ;Wisconsin Univ.-Superior. Center for Lake Superior Environmental Studies.
Year Published 1984
Report Number EPA-600/D-84-149;
Stock Number PB84-201623
Additional Subjects Toxicity ; Meetings ; Aquatic animals ; Regression analysis ; Water quality ; Water pollution ; Environment protection
Library Call Number Additional Info Location Last
NTIS  PB84-201623 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 20p
Although it is traditional to calculate results of chronic toxicity tests using hypothesis testing to detect statistically significant differences from the control, calculation of results using regression analysis offers several major advantages. Regression analysis can directly produce a point estimate of the concentration causing any specified amount of adverse effect. In addition, whereas the degrees of freedom, precision of the test, and selection of have no impact on results calculated using regression analysis, they have a great impact on results calculated using hypothesis testing. Further, use of regression analysis emphasizes the necessity of considering the biological importance of the adverse effects observed in toxicity tests. By using hypothesis testing, aquatic toxicologists have been able to avoid this difficult, important question by presenting results in terms of a variable 'statistically significant difference'.