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RECORD NUMBER: 445 OF 723

OLS Field Name OLS Field Data
Main Title Performance of Statistical Tests for Site Versus Background Soil Comparisons When Distributional Assumptions Are Not Met.
Author Englund, E. J. ;
CORP Author Environmental Protection Agency, Las Vegas, NV. National Exposure Research Lab.
Publisher Mar 2007
Year Published 2007
Report Number EPA/600/R-07/020;
Stock Number PB2007-107708
Additional Subjects Statistical methods ; Soils ; Tests ; Sampling ; Performance ; Site ; Conceptual models ; Comparisons ; Background ; Non-parametric tests ; Realistic population distributions
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P10096VS.PDF
Holdings
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Status
NTIS  PB2007-107708 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 10/08/2007
Collation 56p
Abstract
Statistical distributions of site and background soil samples often do not meet the assumptions of statistical tests. This is true even of non-parametric tests. This paper evaluates several statistical tests over a variety of cases involving realistic population distribution scenarios and sampling schemes. Over the range of cases, performance was erratic for most tests. When planning a project, the sampling scheme must be designed together with the statistical test, and the choice of test may vary depending on which scenario best matches the conceptual model for the site.