[R] ANOVA f-test

[Peter Dalgaard BSA]

Prof Brian D Ripley <ripley at stats.ox.ac.uk> writes:

> > Secondly, how can do a second evaluation using a multiple ANOVA compare using
> > Tukey's procedure?
> 
> Eh?  That could mean several things. If you mean Tukey's method of multiple
> comparisons, it is not currently available in R. (It is in recent versions
> of S-PLUS.)  [John Tukey is one of the most prolific of statisticians ever:
> "Tukey's procedure" is not at all precise.]

To be fair, once we're talking multiple comparisons, there's hardly
more than one. We don't have the procedure as such, but we do have the
studentised range distribution which is at the core of it (ptukey and
qtukey) for equal sized groups (and I don't really trust it for
anything else). Once one has the basic understanding of the ANOVA
tables output, it should be fairly easy to apply it.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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