English: Distribution of Haplogroup R-DF13 in Europe. Data derived from Figures provided in Familytreedna database via the Discover Feature under the country frequency table. Figures are higher than given directly by FamilyTreeDNA. This is because testers disappear between M343 and the downstream clades which contain all testers under M343 (Z2103, S1194, DF19, DF63, Z46516, U106, DF13). These clades are all checked as to their percentage persistence in the regions, and then their persistence is collectively multiplied by whatever decimal is necessary to reach the total M343 percentage persistence in the country. This is valid as there are no other clades under M343 which contain even one single tester in any of these regions, so the only reason a tester who is M343 is not classified under one of these clades is because their test contained insufficient data to do so. The same thing is done for data collected from projects. Unassigned R1bs are removed from the sample size to make it more accurate. See below table.
↑'Republic of Ireland' total not included in FTDNA Discovery Database but is synthetically calculated using:
If you observe the members results chart for the Ulster geographic DNA projects: "Ulster Heritage DNA", "Scots-Irish" and "North of Ireland", you will observe that there is a ratio averagely of about 1:2 for members with their 'Country' (the delineation that FTDNA's data on the Discovery feature cites) set to 'Northern Ireland' or 'Ireland' respectively, when referring to ancestors born within the modern borders of the state of Northern Ireland.
With this figure in mind we can calculate the influence of users with their Country marked as 'Ireland' with ancestors from within the modern boundaries of Northern Ireland (using the respective % for both regions), and remove them from the former's total, calculating the percentage otherwise, so that the two political regions can be compared directly.
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