Natural Resources Training Program

Applied Environmental Statistics

Aug. 25-29, 2014


Agriculture and Life Sciences Building (AGLS BLDG) room 120
600 John Kimbrough Blvd
College Station, TX 77843. (map)

This workshop was offered at a greatly reduced registration fee of $400, thanks to assistance from a Section 319 Nonpoint Source Grant through the TSSWCB.

This 4.5-day course covers applied statistical methods tailored to the environmental sciences.  Exercises using R statistical software at the end of each lesson insure that students can confidently perform each procedure when they return to their office. The course doubles as an introduction to using the free R software. Topics include:

  • Trend analysis -- is it getting better or worse?
  • Confidence, prediction, and tolerance intervals.
  • How hypothesis tests work.
  • Parametric, nonparametric and permutation tests. When to use which.
  • How to build a good regression equation.
  • Dealing with outliers.
  • Introduction to handling nondetect data
  • How many samples do I need?

...and more.


A full course outline is found at


Dr. Dennis Helsel, Ph.D. Environmental Science and Engineering
Dr. Ed Gilroy, Ph.D. Mathematical Statistics

Both instructors have taught this course in North American and overseas since 1990.  Each has over 35 years experience in applying statistics to the environmental sciences, over 30 years of which was with the U.S. Geological Survey.  Dr. Helsel is the author of three textbooks and over 50 articles in journals such as Environmental Science and Technology and Human and Ecological Risk Assessment.  More detail and a full publications list is found at

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