Implementation of Johansen's general formulation of Welch-James'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 non-normality and non-homogeneous 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:10.1111/1469-8986.00060>.
Package details |
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Author | Pablo J. Villacorta <pjvi@decsai.ugr.es> |
Maintainer | Pablo J. Villacorta <pjvi@decsai.ugr.es> |
License | LGPL (>= 3) |
Version | 0.3.2 |
URL | <http://decsai.ugr.es/~pjvi/r-packages.html> |
Package repository | View on CRAN |
Installation |
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