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st: RE: RE: A simple but really hard question


From   "Li, Wenjun" <WLi1@Lifespan.org>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: A simple but really hard question
Date   Wed, 30 Oct 2002 16:43:35 -0500

Thanks, everyone. A friend has suggested to use "double-octiles" for
quantiles based on division into 16 groups of equal frequency. How do you
think about this?  "Sedeciles", as suggested by Nick Cox, is a possible name
too.



Wenjun Li
Biostatistics Research Center
Tufts-New England Medical Center
750 Washington Street, #63
Boston, MA 02111
Tel (617) 636 1603  Fax (617) 636 5560
Email: wli1@lifespan.org <mailto:wli1@lifespan.org> 

		-----Original Message-----
		From:	Nick Cox [mailto:n.j.cox@durham.ac.uk]
		Sent:	Wednesday, October 30, 2002 4:31 PM
		To:	statalist@hsphsun2.harvard.edu
		Subject:	st: RE: A simple but really hard question

		Li, Wenjun
		> 
		> I am trying to find the name of quintiles.  When the 
		> population was divided
		> into four groups according to its distribution, we call 
		> them quartiles; when
		> divided into equally eight groups, we call them octiles; 
		> when divided into
		> 16 groups, what is the name for these quantiles?  
		> 

		"quantiles" is the general name. 

		"quintiles" would be associated with a division 
		into 5 groups. 

		All the words I have heard of for other particular
		cases use Latin roots. So what would it be? 

		The Latin for 16 was "sedecim", so I suppose 
		it would be "sedeciles". 

		However, it wouldn't surprise me -- should you adopt this 
		term -- if you were the first person ever to use it, and 
		whenever you used it, you would have to explain it
		to almost everyone. So, I would stick with quantiles
		based on division into 16 groups of equal frequency, 
		wordier but serviceable. 

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

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