Nondetects and Data Analysis
Nondetects and Data Analysis
Statistics for Censored Environmental Data
Helsel, Dennis R.; USGS
John Wiley and Sons Ltd
11/2004
268
Dura
Inglês
9780471671732
0471671738
508
Adapting survival analysis methods that have been successfully used in medical and industrial research, this title demonstrates their practical applications for studies of trace chemicals in air, water, soils and biota. It offers information needed to master innovative statistical methods for interpreting and analyzing censored environmental data.
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.
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Adapting survival analysis methods that have been successfully used in medical and industrial research, this title demonstrates their practical applications for studies of trace chemicals in air, water, soils and biota. It offers information needed to master innovative statistical methods for interpreting and analyzing censored environmental data.
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.
Este título pertence ao(s) assunto(s) indicados(s). Para ver outros títulos clique no assunto desejado.
