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Originally Posted by Joe1994
I did a DNA test back in June got it back in august. My results showed I'm 90% African heritage 9% European and under 1% native american. But the problem was I got 17 results. All but one result in Africa and all but one result in Europe. Yet all but 2 had range that included 0%. I got Nigeria 30-46% and cote divoire 2-25%. I was told ancestrydna just adds it and puts it in the middle.
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They run 40 different analyses and then average the results. They use a mean average (add all results together, then divide by the amount of results - 40, in this case), not a medium average (which is the middle result). A mean average will not necessarily be right in the middle.
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Well my mom did 23andme and this is where it gets really weird.
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You really can't compare you and your mom's results since you tested with different companies. If you were take 23andMe's test, the results would be different from your AncestryDNA results. ALL ethnicity results from all companies are only an estimate and will vary because they are using different sample groups and different algorithms. It's best not to take the ethnicity results too literally.