welchADF: Welch-James Statistic for Robust Hypothesis Testing under Heterocedasticity and Non-Normality
Version 0.2

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 and published in Keselman, H.J., Wilcox, R.R., and Lix, L.M. (2003) .

Getting started

Package details

AuthorPablo J. Villacorta <[email protected]>
Date of publication2017-10-14 22:45:31 UTC
MaintainerPablo J. Villacorta <[email protected]>
LicenseLGPL (>= 3)
URL <http://decsai.ugr.es/~pjvi/r-packages.html>
Package repositoryView on CRAN
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welchADF documentation built on Nov. 17, 2017, 5:37 a.m.