Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: st: RE: Post-Hoc test for Kruskal Wallis


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: Post-Hoc test for Kruskal Wallis
Date   Mon, 15 Mar 2010 16:51:46 -0000

Thanks, on behalf of those who wanted it. 

In terms of your original question I can see two situations here. 

1. The data come as ranks. No comment to add. 

2. The data do not come as ranks, but working with ranks is a reaction
to some queasiness about the data, e.g. outliers, skewness, some other
kind of messiness. Even in this situation I would tend to play a bit and
consider transformation vs no transformation, or -glm- with different
link functions. If the substantive conclusion is that the scale is
secondary, you can avoid Kruskal-Wallis. If that the scale is crucial,
you (or your client) may need better data. 

Nick 
n.j.cox@durham.ac.uk 

Ricardo Ovaldia

Here it is:
Sokal, R. R. and F. J. Rohlf. 1995. Biometry: the principles and
practice of statistics in biological research. 3rd edition. W. H.
Freeman and Co.: New York.

> 
> > From: Nick Cox <n.j.cox@durham.ac.uk>
> > Date: Monday, March 15, 2010, 11:22 AM

> > . findit Kruskal 
> > 
> > turns up what there is. -findit- is a variant on
> -search-,
> > recommended
> > to you in the last thread you started. 
> > 
> > Minimal name (year) references are deprecated on this
> list.
> > But the
> > procedure recommended in that book is almost
> certainly
> > highly
> > programmable. 
> 
> Ricardo Ovaldia
>  
> > Is there a Post-Hoc test for Kruskal Wallis in Stata?
> > Something like the one proposed by Sokal and Rohlf
> (1995).

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index