Record Display for the EPA National Library Catalog


Main Title Short Test Correlation Analyses on 300, 1975 Model Year Cars. Volume II.
Author Hinton, M. G. ; Thacker., John C. ;
CORP Author Aerospace Corp., El Segundo, Calif. Mobile Systems Group.;Environmental Protection Agency, Ann Arbor, Mich. Emission Control Technology Div.
Year Published 1977
Report Number ATR-77(7623-01)-1; EPA-68-03-2482; EPA/460/3-78/010B;
Stock Number PB-283 801
Additional Subjects Air pollution control ; Exhaust emissions ; Automobiles ; Correlation techniques ; Tests ; California ; Illinois ; Texas ; Colorado ; Arizona ; Michigan ; Comparison ; Concentration(Composition) ; Hydrocarbons ; Carbon monoxide ; Nitrogen oxides ; Tables(Data) ; Air pollution sampling ; Chicago(Illinois) ; Houston(Texas) ; Phoenix(Arizona) ; Denver(Colorado) ; Detroit(Michigan) ; Catalytic reactors(Exhaust system)
Library Call Number Additional Info Location Last
NTIS  PB-283 801 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 375p
A series of statistical analyses was performed to determine the degree of 'correlation' that exists between two specific short tests (STs) and the Federal Emission Certification Test Procedure (FTP) for new vehicles. This work was performed to determine if 'reasonable correlation with certification test procedures' exists; this is a condition precedent to the promulgation of regulations that impose the in-use warranty provisions of Sec. 207(b) of the Clean Air Act of 1970 upon the motor vehicle manufacturers. The basis for the analyses was ST and FTP test data from (a) three 100-vehicle 1975 model year fleets located in (1) Chicago, Illinois, (2) Houston, Texas, and (3) Phoenix, Arizona, (b) a 117-vehicle 1975 model year fleet located in Denver, Colorado, (c) a 147-vehicle 1974 model year fleet located in the greater Detroit, Michigan area, and (d) a 40-vehicle catalyst-equipped '1975-prototype' experimental fleet that had been operated in California in Ford vehicle test programs. Each of the vehicles in these fleets was tested by the FTP, the Federal Short Cycle, and the Federal 3-Mode. Two different statistical analysis methods were used to assess 'correlation'--a conventional correlation analysis, and a contingency table analysis.