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Thread: Sample Bias?

  1. #11
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    Quote Originally Posted by mwauthy View Post
    Where can I access this data? Where does it show total kits per country?
    The best way to compare is here
    https://www.familytreedna.com/public/y-dna-haplotree/A
    My results from David Wesolowski's Ancestry Detective Service:

    West British (Britonic?) 42.3%
    Continental Northern and Eastern European 36.6%
    Central French 21.1%

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  3. #12
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    Quote Originally Posted by MitchellSince1893 View Post
    1. Go to the top of the tree and click on "A".
    2. Then click on 3 dots to the right of the top line "A-PR292"
    3. Select "Country Report"

    This will show you the total number of kits, currently 162,525, and the total for each country

    I was doing this for some R haplogroups so I already had the structure built on my excel spreadsheet. All I had to do was enter the DF29 numbers into my spreadsheet and divide by the total numbers for each country.
    Thanks!

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  5. #13
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    Quote Originally Posted by mwauthy View Post
    Thanks!
    Then you can create a map from the results. This isn't a completed map...no color key, but it gives you an idea of what you can do with any haplogroup using the FTDNA numbers.

    Last edited by MitchellSince1893; 11-25-2018 at 05:51 PM.
    Y-DNA R-Z49>Z142>Z12222>FGC12378>FGC12401>FGC12384
    Ancestry: 37% English, 26% Scot/Ulster Scot, 14% Welsh, 14% German 3% Ireland, 3% Nordic, 2% French & Dutch, 1% India

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  7. #14
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    U152>L2>Z41150>Z49>

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    In case anyone is interested in doing this, This may save you some time on the European country totals...

    Albania 66
    Armenia 500
    Austria 478
    Azerbijan 109
    Belarus 591
    Belgium 355
    Bosnia 113
    Bulgaria 291
    Croatia 154
    Cyprus 57
    Czech 492
    Denmark 555
    England 10996
    Estonia 86
    Faore Isles 4
    Finland 2,421
    France 2,497
    Georgia 238
    Germany 7,326
    Greece 615
    Guernsey 4
    Hungary 800
    Iceland 132
    Ireland 7,767
    Isle of Man 18
    Italy 2,749
    Jersey 1
    Latvia 154
    Liech 7
    Lithuania 708
    Lux 44
    Macedonia 66
    Malta 50
    Moldova 55
    Montenegro 43
    N Ireland 830
    Netherlands 983
    Norway 1,537
    Poland 2,633
    Portugal 722
    Romania 397
    Russia 3,600
    Scotland 5,835
    Serbia 125
    Slovakia 319
    Slovenia 111
    Spain 2,061
    Sweden 2,850
    Switz 1,255
    Turkey 741
    UK 4,127
    Ukraine 1,255
    Wales 922
    Last edited by MitchellSince1893; 11-25-2018 at 06:45 PM.
    Y-DNA R-Z49>Z142>Z12222>FGC12378>FGC12401>FGC12384
    Ancestry: 37% English, 26% Scot/Ulster Scot, 14% Welsh, 14% German 3% Ireland, 3% Nordic, 2% French & Dutch, 1% India

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  9. #15
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    Quote Originally Posted by MitchellSince1893 View Post
    In case anyone is interested in doing this, They may save you some time on the European country totals...

    Albania 66
    Armenia 500
    Austria 478
    Azerbijan 109
    Belarus 591
    Belgium 355
    Bosnia 113
    Bulgaria 291
    Croatia 154
    Cyprus 57
    Czech 492
    Denmark 555
    England 10996
    Estonia 86
    Faore Isles 4
    Finland 2,421
    France 2,497
    Georgia 238
    Germany 7,326
    Greece 615
    Guernsey 4
    Hungary 800
    Iceland 132
    Ireland 7,767
    Isle of Man 18
    Italy 2,749
    Jersey 1
    Latvia 154
    Liech 7
    Lithuania 708
    Lux 44
    Macedonia 66
    Malta 50
    Moldova 55
    Montenegro 43
    N Ireland 830
    Netherlands 983
    Norway 1,537
    Poland 2,633
    Portugal 722
    Romania 397
    Russia 3,600
    Scotland 5,835
    Serbia 125
    Slovakia 319
    Slovenia 111
    Spain 2,061
    Sweden 2,850
    Switz 1,255
    Turkey 741
    UK 4,127
    Ukraine 1,255
    Wales 922
    I wonder what is a good amount for minimum amount of kits sampled in order not to have skewed results as with the Isle of Man percentage?

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  11. #16
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    Quote Originally Posted by mwauthy View Post
    I wonder what is a good amount for minimum amount of kits sampled in order not to have skewed results as with the Isle of Man percentage?
    In the case of Isle of Man. The male population is ~42500. So you would need a minimum of 381 samples. https://www.calculator.net/sample-si...2500&x=82&y=20

    According to the calculator above, the safe number for countries is a minimum of 385 samples.

    The above answer isn't very helpful as it excludes 23 of the above countries

    Just as a WAG (wild ass guess), go with countries with at least 50 to 100 samples total. It's really up to you.
    Last edited by MitchellSince1893; 11-25-2018 at 06:44 PM.
    Y-DNA R-Z49>Z142>Z12222>FGC12378>FGC12401>FGC12384
    Ancestry: 37% English, 26% Scot/Ulster Scot, 14% Welsh, 14% German 3% Ireland, 3% Nordic, 2% French & Dutch, 1% India

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  13. #17
    DNA testing seems to be mainly a New World thing, think USA, Canada, and Australia. So there's going to be less testing from Europe, Asia, Africa, Middle East, etc., especially when it comes to specific Y-DNA testing.

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  15. #18
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    Quote Originally Posted by ianz91 View Post
    DNA testing seems to be mainly a New World thing, think USA, Canada, and Australia. So there's going to be less testing from Europe, Asia, Africa, Middle East, etc., especially when it comes to specific Y-DNA testing.
    Agreed. When you combine the pursuit to find where a certain ancestor came from you are bound to end up with an abundance of New World genealogists flooding the Y-DNA databases.

    It seems the aspect of "not knowing" where ones family may exactly come from drives this testing. I know what my maternal grandfather's haplogroup is however it isn't as "interesting" as my paternal haplogroup because I know where my grandfather was from, his village, the house he grew up in the Netherlands, etc. That is not something I have with my direct paternal lineage.

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  17. #19
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    Here are percentages for I-M253 based on the Ftdna Haplotree since many STR testers show as I-M253 rather than I-DF29. I might add more countries later. Minimum of at least 25 kits positive for I-M253.

    Sweden: 1,291/2,850= 45%
    Norway: 579/1,537= 38%
    Denmark: 202/555= 36%
    Iceland: 42/132= 32%
    Finland: 664/2,421= 27%
    Netherlands: 229/983= 23%
    England: 2,176/10,996= 20%
    Germany: 1,278/7,326= 17%
    Scotland: 797/5,835= 14%
    Wales: 126/922= 14%
    Belgium: 42/355= 12%
    Switzerland: 148/1,255= 12%
    France: 245/2,497= 10%
    Austria: 45/478= 9%
    Ireland: 569/7,767= 7%
    Poland: 173/2,633= 7%

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  19. #20
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    Fascinating. I remember reading somewhere that I1 shows most diversity in Denmark and may have originated there even if it ranks lower than others in percentage terms. Anyone know anything about that?
    Living DNA Cautious mode:
    South Wales Border-related ancestry: 86.8%
    Cornwall: 8%
    Cumbria-related ancestry: 5.2%
    Y line: Peak District, England. Big Y match: Scania, Sweden; TMRCA 1,280 ybp (YFull);
    mtDNA: traces to Glamorgan, Wales, 18th century. Mother's Y line (Wales): R-L21 L371

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