Implementation of Johansen's general formulation of WelchJames's statistic with Approximate Degrees of Freedom, which makes it suitable for testing any linear hypothesis concerning cell means in univariate and multivariate mixed model designs when the data pose nonnormality and nonhomogeneous variance. Some improvements, namely trimmed means and Winsorized variances, and bootstrapping for calculating an empirical critical value, have been added to the classical formulation. The code departs from a previous SAS implementation by L.M. Lix and H.J. Keselman, available at <http://supp.apa.org/psycarticles/supplemental/met_13_2_110/SAS_Program.pdf> and published in Keselman, H.J., Wilcox, R.R., and Lix, L.M. (2003) <DOI:10.1111/14698986.00060>.
Package details 


Author  Pablo J. Villacorta <[email protected]> 
Maintainer  Pablo J. Villacorta <[email protected]> 
License  LGPL (>= 3) 
Version  0.3 
URL  <http://decsai.ugr.es/~pjvi/rpackages.html> 
Package repository  View on CRAN 
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