Dear R-help list,
Does anyone have a function that I could use to determine power for
testing significance of an interaction term in a 2-way ANOVA. The
model I am considering has 2 levels in each factor. I would like to
be able to input sample size (equal in all groups), MSE, means for
the 4 groups, and then get power for the 2 main effects and
interaction term. It would also be nice to enter the desired power
for the interaction effect, and then get sample size for the 4
groups. Any help or guidance would be greatly appreciated.
Best wishes,
--
Justin S. Rhodes
Department of Psychology
Beckman Institute
Neuroscience Program, Institute for Genomic Biology
University of Illinois
405 N. Mathews Avenue
Urbana, IL 61801
Ph: 217-265-0021
Fax: 217-244-5180
e-mail: jrhodes at uiuc.edu
http://www.psych.uiuc.edu/people/showprofile.php?id=545