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OLS Field Name OLS Field Data
Main Title Optimizing Composite Sampling Protocols.
Author Rohlf, F. J. ; Akcakaya, H. R. ; Ferraro., S. P. ;
CORP Author State Univ. of New York at Stony Brook. Dept. of Ecology and Evolution. ;Applied Biomathematics, Setauket, NY.;Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center.
Publisher Apr 94
Year Published 1994
Report Number EPA-68-CO-0051; EPA/600/R-94/048 ; ERLN-N197
Stock Number PB94-162658
Additional Subjects Environmental monitoring ; Statistical sampling ; Value engineering ; Statistical quality control ; Statistical distributions ; Variance(Statistics) ; Convolution integrals ; Collection methods ; Statistical data ; Mathematical models ; Composite samples ; Grab samples
Holdings
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Status
NTIS  PB94-162658 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
Collation 32p
Abstract Composite samples are often used in environmental monitoring programs to reduce costs by decreasing the number of expensive tests that have to be performed. Statistical models for composite sampling are discussed and procedures given for determining the optimal number of primary sampling units to include in each composite sample. For the problem of comparison of means, methods are presented (1) to find the optimum sampling protocol that stays within a fixed budget and (2) to find the least costly sampling protocol that is still able to reliably detect a specific difference in means. Problems with estimating the statistical distribution of the priamry sampling units or of their variance when data have been collected from composite samples are also discussed.
Supplementary Notes Also pub. as State Univ. of New York at Stony Brook. Dept. of Ecology and Evolution rept. no. CONTRIB-795. See also PB87-221164. Prepared in cooperation with Applied Biomathematics, Setauket, NY. Sponsored by Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center.
Category Codes 68
NTIS Prices PC A03/MF A01
Primary Description 600/05
Document Type NT
Cataloging Source NTIS/MT
Control Number 416822594
Origin NTIS
Type CAT