DNA-R1B1C7-L ArchivesArchiver > DNA-R1B1C7 > 2011-04 > 1304209513
From: David Ewing <>
Subject: Re: [R-M222] M222 Chart
Date: Sat, 30 Apr 2011 18:25:13 -0600
The following is quoted from a Jan 2009 email from Bill Howard:
[to calculate the RCC from the correlation coefficient take] the reciprocal
of the number, subtract unity from it and multiply the result by 10,000.
This is the Revised Correlation Coefficient, called RCC. Thus a CC of 0.995
becomes an RCC of 50.
The reason Bill does this is that numbers like 0.995 are harder to remember
and deal with than numbers like 50, but they mean exactly the same thing.
Bill has arrived at estimates of how RCC correlates with TMRCA by using
known pedigrees to calibrate RCC. He has come up with various numbers, but
they tend to be around 40 or 50 years per RCC unit.
|Re: [R-M222] M222 Chart by David Ewing <>|