Philip Dixon, University Professor of Statistics

Where to find me.... 
   In person: 
     2121 Snedecor Hall
     1567 Agronomy (some consulting and office hours) 

   Mailing address:
     Department of Statistics
     Snedecor Hall
     Iowa State University
     Ames, IA 50011-1210
     Tel: (515) 294-2142 
     Fax: (515) 294-4040

     email: pdixon@iastate.edu
     http://www.public.iastate.edu/~pdixon/

Use Google calendar to find out when I'm available for meetings

Details on my academic life: See my curriculum vitae

Quick index to this web page:
    Teaching
    Consulting
    Research
    Manuscripts and Preprints
    Software
    VIGRE Discussion Group
    Photos of my life

Teaching

Statistics 401 Statistical Methods for Research Workers
Statistics 402  Statistical Design and Analysis of Experiments
Statistics 406  Statistical Methods for Spatial Data
Statistics 415  Advanced Statistical Methods for Research Workers
Statistics 493  Workshop in Statistics
Statistics 500  Statistical Methods
Statistics 505  Environmental Statistics
Statistics 511  Statistical Methods - II
Statistics 534  Ecological Statistics
EEB 698  Seminar on Ordination Methods

Research

My favorite research develops and evaluates statistical methods to answer interesting biological questions.  A lot of this work is collaborative.  The themes are using likelihood inference in non-standard situations and using computer-intensive methods.  Some of the current projects include:
 
 
Topic: With:
Estimating the relative contribution of an Individual Effective Dose in toxicology. Man-Yu Yum
Mike Newman
Analysis of overdispersed Poisson data, especially weed counts in agricultural fields various
Combining multiple data sources to estimate mourning dove population growth Dave Otis
Choosing between simple and complex statistical models David Fletcher
Combining information to estimate probabilities of rare events, applied to prey capture probabilities in insectivorous plants. Aaron Ellison, Nick Gotelli
Metabolomics, especially evaluating changes after disabling specific genes Basil Nikolau and the 2010 group

Manuscripts and preprints

Reprints currently available include:

Preprints that are available include:

Software and Data sets

Some useful SAS programs and R programs are available for public domain use. These archives include programs, macros, or functions for estimating Gini coefficients, bootstrapping, analysis of trends in species composition, analysis of censored data, and prediction from linear mixed effects models. Other SAS programs for analysis of experimental data, including variance component estimation, and simple mixed models are available on class web pages:

  • Statistical Methods,
  • Design and Analysis of Experiments,
  • Random coefficient regression,
  • Environmental statistics, and
  • Ecological statistics.

    Some publicly available data sets

    Consulting


    I am available to help ISU faculty and students with:
        design of experiments or observational studies
        choice of statistical methods
        statistical computing
        interpretation of output from statistical computing packages

    I have a broad background in statistical methods and a specific expertise in:
        analyses to demonstrate equivalence
        ecological statistics
            analysis of species composition data
            population size estimation
            analysis of spatial patterns
        environmental statistics
            analysis of censored data, especially below-detection limit values
            analysis of environmental trends
        computer-intensive analysis
            bootstrapping
            randomization tests

    I even like to get out into the field and see work in progress, when time permits.

    To make an appointment, please e-mail me at  pdixon@iastate.edu , or call me at 4-2142.

    VIGRE discussion group on Ecological and Environmental Statistics


    Mark Kaiser is leading the working group this year on the topic of Meteorology and Statistical Science. \ Meetings are Tuedays, 1-2 pm, in 2113

    Photos of the fun parts of my life

    VIGRE working group in ecological and environmental statistics