I've been searching around for a function for computing the
Brown-Forsythe F* statistic which is a substitute for the normal ANOVA
F statistic for when there are unequal variances, and when there is
evidence of non-normality. A couple of other people have asked this
question, the responses I found have been:
?oneway.test
However, that function appears to use the Welch W statistic which,
while good at handling unequal variances, is not as good as F* at
handling non-normal distributions (or so my textbook tells me). So,
two questions:
1) Is there a function ready to use for calculating the Brown-Forsythe F*?
2) If not, what do people use for checking the results of a
(one-way) ANOVA when there is non-normality as well as non-constant
variances?
Thanks,
--Paul
--
Paul Lynch
Aquilent, Inc.
National Library of Medicine (Contractor)
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