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.
To train scientists in air, water, soil, and biological sciences to make sense of your data.
We provide online on-demand courses in Environmental Statistics. See our Training Page
for course details.
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 -- Matched Pair Tests for Data With Nondetects
April 21, 2020. Access at any time beginning that day.
Paired differences such as concentrations Before/After a treatment at a series of sites or Upstream/Downstream of an outfall at several points in time are usually analyzed for change with a paired t-test (parametric) or signed-rank test (nonparametric). But what methods can be used when data include values below detection or quantitation limits without substitution of numbers for nondetects? This video will present what methods are available and demonstrate their use with R software.
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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