Hello useRs,
MBESS (Methods for the Behavioral, Educational, and Social Sciences)
has recently been released and should be on all of the mirrors by now
(with binaries for Mac and Windows:
http://cran.r-project.org/src/contrib/Descriptions/MBESS.html).
The major contribution of MBESS is confidence intervals for
noncentrality parameters (t, F, and chi-square) and standardized
effect sizes (e.g., the standardized mean and mean difference, R^2 for
random or fixed effects, the coefficient of variation, the root mean
square error of approximation, standardized regression coefficients)
as well as sample size planning from the accuracy in parameter
estimation (AIPE) approach, where the width of the observed confidence
intervals is of interest (in addition to or instead of the power
analytic approach to sample size planning).
This is the 10th release of MBESS and it is version number is now 1.0.0.
Detailed information about MBESS is available in the current issue of
Behavior Research Methods
(http://www.psychonomic.org/BRMIC/contents.htm) as well as Journal of
Statistical Software (http://www.jstatsoft.org/v20/i08).
Take care,
Ken
--
Ken Kelley, Ph.D.
Indiana University
Inquiry Methodology Program
201 North Rose Avenue, Suite 4000
Bloomington, Indiana 47405
Phone: 812-856-8330 / Fax: 812-856-8333
Email: KKIII at Indiana.Edu
Internet: http://www.indiana.edu/~kenkel
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