Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing

Analysis of low concentrations of trace contaminants in environmental media often results in left-censored data that are below some limit of analytical precision. Interpretation of values becomes complicated when there are multiple detection limits in the data—perhaps as a result of changing analyti...

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Veröffentlicht in:	Computers & geosciences 2007-05, Vol.33 (5), p.696-704
Hauptverfasser:	Lee, Lopaka, Helsel, Dennis
Format:	Artikel
Sprache:	eng
Schlagworte:	Censored data Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Exact sciences and technology Geochemistry Hydrogeology Hydrology. Hydrogeology Kaplan–Meier Mineralogy Pollution, environment geology S-Plus Silicates Survival analysis Water geochemistry
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