Nondetects
And
Data Analysis
(NADA)
Statistics for censored environmental data

The MDLWIN program is no longer available. It was written in 1990 and served us well for 20 years. It worked through Windows XP, and sort of in Windows Vista and 7. It will be replaced by a new Excel ROS worksheet, which will perform all of the calculations of the MDLWIN program and more. Look for it here soon, or sign up for our newsletter to hear about its release.

Files to download
NADA macros for Minitab v. 3.0.1 NEW 1/2012
NADA macros for Minitab v. 3.0 NEW 1/2012
Color brochure and outline for the NADA course
Data sets from the NADA textbook. Version 1.1.
Answers to Exercises and Errata Sheet - version 1.0, updated 10/2004.
Example use of the NADA for R software package
SAS macro for Robust ROS. Computes descriptive statistics (mean, etc) for censored data using ROS. This macro correctly sets to missing all nondetects that are higher than all detected values.