Award Date

1-1-2005

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Mathematical Sciences

First Committee Member

Ashok K. Singh

Number of Pages

48

Abstract

Environmental engineers and scientists often encounter trace level concentrations of contaminants that fall below the detection limit (DL) are reported as 'less than DL'. The common method of dealing with non-detects in a multivariate sample is the substitution method in which each observation 'less than DL' is replaced by a suitable value (0, DL/2 or DL) with DL/2 being the recommended method; In this thesis, the applicability of Kaplan-Meier method, which was developed for estimating the survival function in the presence of right censored data, is investigated. Some simulated examples are presented.

Keywords

Covariance; Detects; Estimation; Matrix; Presence

Controlled Subject

Statistics

File Format

pdf

File Size

1546.24 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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