by Dennis R. Helsel
at market price from your favorite bookseller
This second edition introduces and explains methods for analyzing and interpreting censored ("nondetect") data in the environmental sciences. Adapting survival analysis techniques from other fields, the book translates well-established methods from other disciplines into new solutions for environmental studies. It applies methods of survival analysis, including methods for interval-censored data to the interpretation of low-level contaminants in environmental sciences and occupational health. New to the second edition is a chapter on multivariate methods for censored data, the use of interval-censored methods (especially for "remarked data" between the detection and quantitation limits), and expanded coverage of graphical methods for censored data. The basis for our Nondetects And Data Analysis course and webinars.
by Dennis R. Helsel and Robert M. Hirsch
Classic text on statistics applied to the environmental sciences. It is the basis for about 75% of our Applied Environmental Statistics online course. Download it here.
The second edition (with lots of new material, and examples done with R software) will be available in early 2018 — sign up for our newsletter to be notified when it is released.