Accession Number : ADA299424

Title :   Environmental Effects of Dredging: Guidelines for Statistical Treatment of Less Than Detection Limit Data in Dredged Sediment Evaluations.

Descriptive Note : Technical notes.

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

PDF Url : ADA299424

Report Date : JUL 1995

Pagination or Media Count : 13

Abstract : This technical note provides recommendations for methods of handling less than detection limit data to permit statistical comparisons of sediment contaminant or bioaccumulation samples in dredged sediment evaluations. Ten censored data methods are evaluated; performance depends upon data characteristics such as equality of variances, type of frequency distribution, and the proportion of the data that is below detection limit. (AN)

Descriptors :   *DREDGED MATERIALS, *SEDIMENTS, CHEMICAL CONTAMINATION, PARAMETERS, MAXIMUM LIKELIHOOD ESTIMATION, PROBABILITY DISTRIBUTION FUNCTIONS, COMPARISON, STATISTICAL DATA, ANALYSIS OF VARIANCE, MONTE CARLO METHOD, ENVIRONMENTAL IMPACT, LINEAR REGRESSION ANALYSIS, DREDGING, CONCENTRATION(CHEMISTRY), DISTRIBUTION FUNCTIONS, NORMAL DISTRIBUTION.

Subject Categories : Hydrology, Limnology and Potamology
      Solid Wastes Pollution and Control
      Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE