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Non-Detects and Data Analysis
Statistics for Censored Environmental Data
Hosted by U.S. EPA
Region 10

For most environmental professionals, the way to deal with "nondetects" is less than obvious. Values below detection or reporting limits result from measuring trace amounts of a variety of organic and inorganic chemicals. This course presents up-to-date (maximum likelihood and survival analysis) methods for computing summary statistics, hypothesis tests, and regression for data with one or more detection limits. Example problems are worked in class, so students can confidently take these methods back to their office. The course assume ...  [click for more]

For general information contact Diane Ruthruff by telephone at 206-553-5139 (Fax: 206-553-4672) or via e-mail at ruthruff.diane@epa.gov

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