The following guide was suggested on the spss listserv: http://www-users.york.ac.uk/~mb55/talks/upset.htm
User-friendly multivariate stats resource
Statnotes: Topics in Multivariate Analysis, by G. David Garson
http://www2.chass.ncsu.edu/garson/pa765/statnote.htm
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RESEARCH METHODS
This ten chapter research methods text is written for both undergraduate and graduate students in education, psychology, and the social sciences. It focuses on the basics of research design and the critical analysis of professional research in the social sciences from developing a theory, selecting subjects, and testing subjects to performing statistical analysis and writing the research report.
Author: Dr. Christopher L. Heffner
Licensed Psychologist
Published: March 11, 2004
http://allpsych.com/researchmethods
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Web Page with many statistics and methods links
http://gsociology.icaap.org/methods/resrch.htm
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Interactive Tutorial on Analysis of Covariance
bama.ua.edu/~jhartman/689/ancovaglm.ppt
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ANCOVA web page
http://carbon.cudenver.edu/~lsherry/rem/ancova.html
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Here's an article from Economist.com called
"Why so much medical research is rot"
It focuses on the testing of multiple hypotheses within a study and is worth reading.
http://www.economist.com/science/displaystory.cfm?story_id=8733754