Main Title |
The maximum likelihood approach to probabilistic modeling of air quality data / |
Author |
Fitz-Simons, Terence.
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Other Authors |
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CORP Author |
Environmental Monitoring and Support Lab., Research Triangle Park, NC. |
Publisher |
Environmental Monitoring and Support Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, |
Year Published |
1979 |
Report Number |
EPA-600/4-79-044 |
Stock Number |
PB80-104110 |
OCLC Number |
53093266 |
Additional Subjects |
Statistical analysis ;
Air pollution ;
Weibull density functions ;
Gamma function ;
Statistical tests ;
Chi square test ;
Kolmogorov-Smirnov test ;
Normal density functions ;
Computer programming ;
Mathematical models ;
Subroutines ;
MAXFIT computer program ;
Gamma density functions ;
Lognormal density functions ;
Maximum likelihood estimation
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Internet Access |
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Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EJBD |
EPA 600/4-79-044 |
|
Headquarters Library/Washington,DC |
04/14/2014 |
EKBD |
EPA-600/4-79-044 |
|
Research Triangle Park Library/RTP, NC |
10/02/2003 |
ELBD ARCHIVE |
EPA 600/4-79-044 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ESAD |
EPA 600-4-79-044 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
NTIS |
PB80-104110 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
vi, 34 p. : ill. ; 28 cm. |
Abstract |
Software using maximum likelihood estimation to fit six probabilistic models is discussed. The software is designed as a tool for the air pollution researcher to determine what assumptions are valid in the statistical analysis of air pollution data for the purpose of standard setting, roll-back calculations, estimation of maximum concentrations, threshold approximations, and handling missing observations. The program fits user's data to the normal distribution, the 3-parameter lognormal distribution, the 3-parameter Weibull distribution, the 3-parameter gamma distribution, the Johnson S(B) distribution (a 4-parameter lognormal distribution), and the 4-parameter beta distribution. The parameters are estimated using standard closed solutions to maximizing equations, and a golden section search for all other parameters. Graphical output contains a histogram of the data superimposed by the fitted density for each model. Six goodness-of-fit criteria are supplied and ranked by the program to aid in the selection of the most appropriate choice among the six models. These criteria are absolute deviations, weighted absolute deviations, Kolmogorov-Smirnov statistic, Cramer-von Mises-Smirnov statistic, the log-likelihood function, and the observed significance level of the Chi-square goodness-of-fit test. The results of applying the program to several subsets of the Los Angeles Catalyst Study data base are presented. |
Notes |
"July 1979"--Cover. "EPA-600/4-79-044"--Cover. |
Place Published |
Research Triangle Park, N.C. |
Access Notes |
Also available via the World Wide Web |
Corporate Au Added Ent |
United States. Environmental Protection Agency.; United States. Environmental Protection Agency. Office of Research and Development.; United States. Environmental Protection Agency. Office of Research and Development. Environmental Monitoring and Support Laboratory. |
Title Ser Add Ent |
Research reporting series. Environmental monitoring ; EPA-600/4-79-044. |
PUB Date Free Form |
1979 |
Series Title Traced |
Research reporting series Environmental monitoring ; EPA-600/4-79-044 |
Series Title Untraced |
Research reporting series. 4, Environmental monitoring ; EPA-600/4-79-044 |
NTIS Prices |
PC A03/MF A01 |
BIB Level |
m |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20140912111618 |
Language |
eng |
Origin |
OCLC |
Type |
MERGE |
OCLC Rec Leader |
01540cam 2200325Ka 45020 |