Stat 505 - Environmental Statistics - Spring 2008
Dr. Philip Dixon
- Last update: 17 Apr 2008
- Posted HW 3, due at end of finals week
- Posted R and SAS programs for trend
- Posted references and readings for part 3 (trend)
-
Information: (N.B. some files are pdf files, which require Acrobat Reader)
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Berkson, 1951, Why I prefer logits to probits A fascinating
article on the use of the logit and probit models and concept of a
tolerance distribution. Not assigned, but you might find it
interesting if you're interested in statistics or toxicology.
Berkson was a fascinating character. His graduate degrees were an MA in
Physics (1922), then an M.D. (1927), then a Sc.D. in
Statistics (1928). After working as
a surgeon for a few years, he became head of the Division of
Biometry and Medical Statistics at Mayo Clinic. One obituary (JRSS
A, 1983, p 438-439) describes him as 'scientist, statistical
philosopher, innovator, and
much loved curmudgeon'. His debate with Finney on tolerance
distributions was long-running.
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Syllabus
- References
for part 1, Analysis of Data with Below Detection Limit Values
- References
for part 2, Toxicology statistics
- References
for part 3, Analysis of Trends
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Assigned Readings:
- Below-detection limit data
- Chapter
13, Methods for Data Below the Reporting Limit, from
Helsel and Hirsch, Statistical Methods in Water Resources.
Book is now out print. Contents available online.
If you want the entire book (or the link to the references), start here.
- Akritas, M.G. et al. 1994. Statistical analysis of censored
environmental data. pp 221-242 in Patil and Rao, Environmental
Statistics. Master Copy can be borrowed from the Stat reading
room, 3455 Wilson, or the Entomology reading room.
- Toxicology
- Grieve, A. 1996. On likelihood and Bayesian methods for
interval estimation of the LD$_{50}$. pp 87-100 In Morgan,
B.J.T. (ed.) Statistics in Toxicology. Oxford UK, Oxford Science
Publications. (Material in 8.1 - 8.4 is relevant to class
discussion; not responsible for 8.5-end)
- Barton, A. L. 1994. Ecological risk assessment in the Office of
Pesticide Programs. pp 27 - 31 in Kendall, R.J. and Lacher,
T.E. 1994. Wildlife Toxicology and Population Modeling. SETAC
press. (This is an overview from an EPA administrator).
- Hill, E.F. 1994. Acute and subacute toxicology in evaluation of
pesticide hazard to avian wildlife. pp 207 - 226 In Kendall,
R.J. and Lacher, T.E. 1994. Wildlife Toxicology and Population
Modeling. SETAC Press. (Background on how avian toxicity tests are
conducted and how the LC$_{50}$ values are interpreted. Not
responsible for details).
- James, A.T. 1996. Chester Bliss and the International Biometric
Society. Chapter 2 in Armitage, P. and David, H.A. {\it Advances in
Biometry} New York: Wiley.
- Trends
- Chapter
12, Trend Analysis, from
Helsel and Hirsch, Statistical Methods in Water Resources.
Book is now out print. Contents available online.
- Dixon, P.M. 2005. A statistical test to show negligible trend.
Ecology 86:1751-1756.
- Chow and Liu, pp 15-27.
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- Hahn and Meeker, 1991. Overview of different types of
statistical intervals.
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Other things in the Reading Room (3455 Wilson):
- Helsel, D. 2005. Nondetects and Data Analysis: Statistics for
Censored Environmental Data.
- Hahn and Meeker, 1991. Statistical Intervals. Wiley.
- Computing
- UNCENSOR A standalone PC program for various estimation
methods. Does not include KM.
- R project Archive for
the R program and packages. Click on your operating system
(e.g. Windows) then click on base. This will download the setup
file. Execute that and R will be installed. Packages can be
downloaded and installed from within R. (See packages on the main
menu)
- R
introduction A quick introduction to using R for computing.
- Homework: (N.B. Assignments are in pdf format, which require Acrobat
Reader to read or print
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Data sets and programs