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Dennis R. Helsel

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Publication

Featured researches published by Dennis R. Helsel.

Archive | 1992

Statistical methods in water resources

Dennis R. Helsel; Robert M. Hirsch

Environmental Science & Technology | 1990

Less than obvious - statistical treatment of data below the detection limit

Dennis R. Helsel

Nondetects and data analysis. Statistics for censored environmental data. | 2005

Nondetects and data analysis : statistics for censored environmental data

Dennis R. Helsel

Environmental Science & Technology | 1997

Risk of nitrate in groundwaters of the United States : A National perspective

Bernard T. Nolan; Barbara C. Ruddy; Kerie J. Hitt; Dennis R. Helsel

Environmental Science & Technology | 2005

More Than Obvious: Better Methods for Interpreting Nondetect Data

Dennis R. Helsel

Archive | 2012

Statistics for Censored Environmental Data Using Minitab and R

Dennis R. Helsel

Archive | 2005

Nondetects and data analysis

Dennis R. Helsel

Environmental Science & Technology | 2006

Regional Kendall test for trend

Dennis R. Helsel; Lonna M. Frans

Water Conditioning and Purification | 1998

A national look at nitrate contamination of ground water

Bernard T. Nolan; Barbara C. Ruddy; Kerie J. Hitt; Dennis R. Helsel

Journal of The American Water Resources Association | 1988

“Applicability of the t‐Test for Detecting Trends in Water Quality Variables,” by Robert H. Montgomery and Jim C. Loftis

Dennis R. Helsel; Robert M. Hirsch

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Bernard T. Nolan

United States Geological Survey

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Kerie J. Hitt

United States Geological Survey

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Robert M. Hirsch

United States Geological Survey

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Joseph D. Ayotte

United States Geological Survey

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Laura Hayes

United States Geological Survey

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Sarah M. Flanagan

United States Geological Survey

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