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RECORD NUMBER: 4 OF 6

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
Library Call Number Additional Info Location Last
Modified		 Checkout
Status
NTIS  PB2007-107708 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
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.