How is the range calculated?

November 11, 2018

https://www.ancestry.com/cs/dna-help/ethnicity/bootstrapping

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Ethnicity estimates are not an exact science. The percentage AncestryDNA reports to a customer is the most likely percentage within a range of percentages. In this section, we discuss how we calculate this range. It is important to keep in mind that here at AncestryDNA we continue to build upon our previous work to offer ever more accurate results to our customers
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