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st: RE: A simple but really hard question

From   "Nick Cox" <>
To   <>
Subject   st: RE: A simple but really hard question
Date   Wed, 30 Oct 2002 21:31:21 -0000

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. 


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