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st: RE: RE: RE: How to perform a non parametric manova
From
"Hoffman, George" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: RE: RE: How to perform a non parametric manova
Date
Wed, 26 May 2010 13:14:36 -0500
Highly reliably so!
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Wednesday, May 26, 2010 9:31 AM
To: [email protected]
Subject: st: RE: RE: How to perform a non parametric manova
Sounds good advice, don't you think?
Nick
[email protected]
Hoffman, George
Nick Cox replied to a similar question (how to make manova valid on data
with non-parametric distributions) a few years back as follows:
"I find some inconsistency in this request. After all, what would a
non-parametric MANOVA look like except something like a MANOVA, except
that your data have been transformed to ranks? If you are happy to
reduce your data to ranks, why cavil at some other transformation, which
typically would lose less information?
Further, my visceral instinct is that MANOVA is more robust to
non-normality than people fear.
More positively, if this were my problem, I might do
1. MANOVA on original data
2. MANOVA on rank-transformed data
If the conclusions were substantively similar, stop there. Otherwise,
consider what specific transformations were advisable.
amatoallah ouchen
Does anyone have an idea about how to perform a non parametric manova?
an equivalent of the kruskal wallis test for anova?
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