Free downloads:

1. Applied Environmental Statistics course textbook

2. Software for handling nondetect data (Version 5.0 of the NADA package for Minitab v18)

3. Software for handling nondetect data (Version 4.4 of the NADA package for Minitab v17)

4. Users guide to NADA for R — the software for the R statistical system for handling nondetect data

5. Excel worksheet to compute the mean, UCL95 and other statistics using the Kaplan-Meier method for nondetects

6. All of our newsletters with tips for analysis of environmental data

7. Webinar Handouts (pdfs of PowerPoint slides)
a) Fitting Distributions to Data with NDs — 2/19/19
b) Testing Groups of Data with Multiple Detection Limits — 3/19/19
c) Forty Years of Water Quality Statistics: What's Changed, What Hasn't? -- 4/23/19
d) The Mystery of Nondetects: How Censored Data Methods Work -- 5/21/19

8. Webinar Questions with Answers (Excel files)
a) Fitting Distributions to Data with NDs — 2/19/19
b) Testing Groups of Data with Multiple Detection Limits — 3/19/19
c) Forty Years of Water Quality Statistics: What's Changed, What Hasn't? -- version 2, 4/25/19
d) The Mystery of Nondetects: How Censored Data Methods Work. Q&A -- 5/21/19

(Recordings of past webinars are available on our Online Training Center. See our Webinars Page for all available, and free, webinars.)

Much more is available when you take any of our online courses, including software for:
Applied Environmental Statistics course: prediction and tolerance intervals and trend analysis — made easy;
Nondetects and Data Analysis course: a variety of methods to perform data analysis for nondetects;
…. and more.

See our Online Training Center

Online at: