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Archiver > GENEALOGY-DNA > 2007-12 > 1197235312


From: "Lawrence Mayka" <>
Subject: Re: [DNA] E3b1a2 V13+ SNP-tested modal posted to YSearch
Date: Sun, 9 Dec 2007 15:21:52 -0600
In-Reply-To: <013101c83a9f$daddf710$eb2a424b@Den>


1) The higher the financial hurdle, the more biased the "sample" that jumps
that hurdle. The population that gets to 37 markers will be more skewed
than the population at 12 markers; the 67-marker group will be even more
skewed. This is a basic rule of economics and marketing.

2) The more specialized or unnecessary the hurdle, the more biased the
"sample" that jumps the hurdle. The population that orders deepSNP-E3b will
be more skewed than those who rely on markers, and the group that completes
the V Series will be even more skewed. This, too, is a basic rule of
economics and marketing.

We can make an analogy to houses:

1) People who buy million-dollar homes are less representative of the
American population than those who buy $200,000 homes.

2) People who furnish their million-dollar homes with Dadaist artwork are
even less representative than million-dollar homeowners in general.

Getting back to yDNA tests, my point was that the population willing to
purchase not only 37 markers (which often have practical genealogical
utility) but also a deepSNP-E3b test and a V Series test (typically
luxuries, only rarely of practical value to those already at 37 markers) is
going to be _doubly_ skewed.

> [mailto:] On Behalf Of Ron Schaming
> As I understand the collection of DNA data provided
> by interested
> individuals, I fail to see where their financial ability to
> provide those
> samples has any more impact to the modal values than any
> other sampling
> result that is not properly collected.


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