Archiver > GENEALOGY-DNA > 2010-03 > 1268612539

From: "Ken Nordtvedt" <>
Subject: Re: [DNA] Percentages of males and females who reproduce - compareto the "one third rule"
Date: Sun, 14 Mar 2010 18:22:20 -0600
References: <SNT115-W31A2CB4A7320E1EEF018E8CC2E0@phx.gbl>

----- Original Message -----
From: "Steven Bird" <>

> This has really started me thinking about the basis for the 1/3 rule.
> [[ Only basis for any 1/3 "rule", if you want to call it such, is error.
> Real or effective population size does not enter the variance expected
> value determinations. This is not to say that children per couple and
> breeding fraction at any one time, etc. may not be correct numbers? They
> are just not relevant to variance expected values of any kind, although it
> indirectly feeds into the distribution (statistical confidence intervals)
> of variance about its expected values.]]

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