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st: Mills' ratio


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Mills' ratio
Date   Sun, 13 Mar 2005 17:26:00 -0000

The dreaded "mill's ratio" made another 
appearance recently. Other mutations 
appear intermittently. 

The correct naming is easy to determine. 
This ratio is named for John P. Mills 
whose tabulation appears in 

Table of the Ratio: Area to Bounding Ordinate, 
for Any Portion of Normal Curve.  
Biometrika 18: 395--400 (1926) 

Thus allowing for differences of opinion 
on what should be punctuated and how, three
(and only three) variations appear acceptable. 

Mills ratio
Mills' ratio
Mills's ratio 

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

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