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Thread: Sample Bias?

  1. #1
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    Sample Bias?

    What’s going on in Denmark? Is there sample bias there where for some odd reason they are the only country in the region not testing Y dna very much, or is I-DF29 truly not that common in that country? Here are numbers for I-DF29 based on the Ftdna public haplotree.

    -Sweden 985 kits with a pop of 10m
    -Finland 525 kits with a pop of 5.5m
    -Norway 358 kits with a pop of 5.3m
    -Denmark 98 kits with a pop of 5.8m
    I1> DF29> Z58> Z59> Z2041> Z2040> Z382> S26361> S16414> FGC24354> FGC24357> FGC24356> S10350> FGC75802> Y125947> S21197> BY149414> BY188003> BY188570

    YFull id: YF15884

    Hidden Content

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    I have a feeling it's just the amount of Danes and those of Danish descent who haven't done DNA testing. I-DF29 is the most dominant lineage under M253 so it being absent from Denmark would be an improbability.

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  5. #3
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    Quote Originally Posted by mwauthy View Post
    What’s going on in Denmark? Is there sample bias there where for some odd reason they are the only country in the region not testing Y dna very much, or is I-DF29 truly not that common in that country? Here are numbers for I-DF29 based on the Ftdna public haplotree.

    -Sweden 985 kits with a pop of 10m
    -Finland 525 kits with a pop of 5.5m
    -Norway 358 kits with a pop of 5.3m
    -Denmark 98 kits with a pop of 5.8m
    At this point, it appears the Danes aren’t really that inclined towards having their DNA tested. I don’t have the total figures off the top of my head but as your numbers indicate, the Swedes, Finns and Norwegians far surpass them in that regard.
    Last edited by JMcB; 11-25-2018 at 04:57 PM.
    Known Paper Trail: 45.3% English, 29.7% Scottish, 12.5% Irish, 6.25% German & 6.25% Italian. Or: 87.5% British Isles, 6.25% German & 6.25% Italian.
    LivingDNA: 88.1% British Isles (59.7% English, 27% Scottish & 1.3% Irish), 5.9% Europe South (Aegian 3.4%, Tuscany 1.3%, Sardinia 1.1%), 4.4% Europe NW (Scandinavia) & 1.6% Europe East, (Mordovia).
    FT Big Y: I1-Z140 branch I-F2642 >Y1966 >Y3649 >A13241 >Y3647 >A13248 (circa 830 AD) >A13242/YSEQ (circa 975 AD) >A13243/YSEQ (circa 1550 AD).

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    You shouldn't really compare to total population because you might be skewing the result, but to the # of kits sampled
    YDNA - E-Y31991>PF4428>E-Y134097>E-Y168273 (probably Scythian-Sarmatian). Domingos Rodrigues, b. circa 1680 Hidden Content , Viana do Castelo, Portugal
    mtDNA - H20. Maria Josefa de Almeida, b. circa 1750 Hidden Content , Porto, Portugal

    Global25 PCA West Eurasia dataset Hidden Content
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    [1] "distance%=1.7726"

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    Celtiberian,77.6
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    Denmark is under represented, but still has the lowest percentage of DF29.

    Total kits for those countries
    Denmark: 555, 17.7% I-DF29
    Finland: 2421 (smaller pop than Denmark, they must really be into dna tests) 21.7% I-DF29
    Norway: 1537, 23.3% I-DF29
    Sweden: 2850, 34% I-DF29

    Denmark has ~ half the DF29 percentage of Sweden.
    Last edited by MitchellSince1893; 11-25-2018 at 04:56 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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  11. #6
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    Quote Originally Posted by Ruderico View Post
    You shouldn't really compare to total population because you might be skewing the result, but to the # of kits sampled
    You are correct!
    Last edited by mwauthy; 11-25-2018 at 05:15 PM. Reason: Error

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  13. #7
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    Quote Originally Posted by MitchellSince1893 View Post
    Denmark is under represented, but still has the lowest percentage of DF29.

    Total kits for those countries
    Denmark: 555, 17.7% I-DF29
    Finland: 2421 (smaller pop than Denmark, they must really be into dna tests) 21.7% I-DF29
    Norway: 1537, 23.3% I-DF29
    Sweden: 2850, 34% I-DF29

    Denmark has ~ half the DF29 percentage of Sweden.
    I misread your post initially. Thanks for the figures.
    Last edited by mwauthy; 11-25-2018 at 05:14 PM. Reason: Error

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    Quote Originally Posted by mwauthy View Post
    I misread your post initially. Thanks for the figures.
    Here's a list of European countries in the FTDNA database with their DF29 percentages
    Isle of Man 44.44%
    Sweden 34.49%
    Faroe Islands 25.00%
    Norway 23.36%
    Finland 21.81%
    Denmark 17.12%
    Liechtenstein 14.29%
    Montenegro 13.95%
    Slovenia 11.71%
    Netherlands 9.87%
    Estonia 9.30%
    England 6.78%
    Germany 6.62%
    N Ireland 6.27%
    Belgium 6.20%
    United Kingdom 5.77%
    Serbia 5.60%
    Scotland 5.48%
    Bosnia 5.31%
    Switz 5.10%
    Albania 4.55%
    Croatia 4.55%
    Macedonia 4.55%
    Bulgaria 4.47%
    France 4.12%
    Portugal 3.74%
    Poland 3.61%
    Austria 3.14%
    Iceland 3.03%
    Romania 2.77%
    Wales 2.71%
    Ireland 2.69%
    Czech 2.64%
    Slovakia 2.51%
    Russia 2.28%
    Spain 2.18%
    Lithuania 1.84%
    Moldova 1.82%
    Italy 1.64%
    Hungary 1.63%
    Ukraine 1.59%
    Belarus 1.52%
    Latvia 1.30%
    Greece 0.98%
    Georgia 0.42%
    Turkey 0.27%
    Last edited by MitchellSince1893; 11-25-2018 at 06:48 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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  17. #9
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    Quote Originally Posted by MitchellSince1893 View Post
    Here's a list of European countries in the FTDNA database with their DF29 percentages
    Where can I access this data? Where does it show total kits per country?

  18. #10
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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?
    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.
    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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