Welcome to Practical Stats

Statistical training and consulting for the environmental sciences and natural resources. From Singapore to South Dakota, our courses have enabled scientists to build better regression models, test for trends, see multivariate patterns, and correctly interpret nondetect (censored) data.

Our Mission
To train scientists in air, water, soil, and biological sciences to make sense of your data.

Training Courses
We provide online on-demand courses in Environmental Statistics. See our Training Page for course details.

The 2020 version of the classic textbook Statistical Methods in Water Resources is now available for download. See the link on our Books page.

To be notified of our free monthly webinars, sign up on our News page and we'll send you an opt-in link to receive notices. Recordings of past webinars are available on our Online Training Center.
Our Next Webinar -- How Many Observations Are Censored Data Worth?
June 16, 2020. Access at any time beginning that day.

Your dataset has 30 observations, 12 of which are nondetects. How many equivalent observations do you have for the information content possessed in these data? Is it more than just 30 - 12 = 18 detected observations? How much more? What if these are at multiple reporting limits? How can you rebut a statement like "nondetects don't tell you much, you might as well drop them from the dataset"?

See our Webinars Page for details and for info on past webinars available for viewing.

We've provided statistical training for the environmental sciences and natural resources since 1990 in the United States, Europe, Asia and the Middle East. See our credentials page. We clearly communicate information to the working scientist. We make statistics current, accurate, and practical.

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If you send us email requesting an answer, you may receive occasional emails from us announcing information on environmental statistics (no more than 3 per year, usually less). In your Contact Us email you may request that we do not add you to our occasional information list, and your email address will not be saved — but you will not get useful information from us on environmental statistics.

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