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Home > Sciences & Environment > Regional and area planning > Nondetects and Data Analysis: Statistics for Censored Environmental Data(Statistics in Practice)
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Nondetects and Data Analysis: Statistics for Censored Environmental Data(Statistics in Practice)

Nondetects and Data Analysis: Statistics for Censored Environmental Data(Statistics in Practice)


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About the Book

The measurement of trace chemicals in water, air, soil, and biota frequently results in values reported only as less than the detection limit. The standard practice in environmental science for interpreting these data is woefully inadequate, usually consisting of substituting one-half the detection limit and performing traditional statistics tests. Offering a unique approach, this book presents methods that are widely used in medical and industrial settings but have been rarely or never applied to issues of environmental health. The steps necessary to take these existing procedures and apply them to left-censored environmental data are fully illustrated.

Table of Contents:
Preface. Acknowledgments. Introduction: An Accident Waiting To Happen. 1. In Focus. 2. The Three Approaches. 3. Reporting Limits. 4. Storing Data in Databases. 5. Plotting Data With Nondetects. 6. Computing Summary Statistics. 7. Computing Interval Estimates. 8. What Can Be Done When All Data Are Below the Reporting Limits? 9. Comparing Two Groups. 10. Comparing Three or More Groups. 11. Correlation. 12. Regression and Trends. Appendix: Datasets. References. Index.

About the Author :
DENNIS R. HELSEL, PhD, is a 2003 recipient of the American Statistical Association Section on Statistics and the Environment's Distinguished Achievement Award. His textbook, Statistical Methods in Water Resources, coauthored by Robert Hirsch, is a standard reference in the water resources community. Dr. Helsel currently does research on behalf of the United States Geological Survey in Denver, Colorado.

Review :
"...clearly and efficiently covers a large amount of material in a relatively small number of pages. This is the book I will share with consulting clients who have data with below detection limit values." (Journal of the American Statistical Association, March 2006) "...an excellent addition to an upper level undergraduate course on environmental statistics, and it is a 'must-have' desk reference for environmental practitioners dealing with censored datasets." (Vadose Zone Journal, February 2006)


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Product Details
  • ISBN-13: 9780471671732
  • Publisher: John Wiley and Sons Ltd
  • Publisher Imprint: John Wiley & Sons Inc
  • Height: 241 mm
  • Returnable: N
  • Spine Width: 19 mm
  • Weight: 603 gr
  • ISBN-10: 0471671738
  • Publisher Date: 01 Nov 2004
  • Binding: Hardback
  • Language: English
  • Series Title: Statistics in Practice
  • Sub Title: Statistics for Censored Environmental Data
  • Width: 161 mm


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Nondetects and Data Analysis: Statistics for Censored Environmental Data(Statistics in Practice)
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