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  #1  
Old 03-08-20, 14:17
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Default 8 cM

When Ancestry say 8 cM, do they mean:

8.0001 -8.9999 cm or
7.5000 -8.4999

It makes quite a difference and probably 70% of matches will fall in the lower half of the range.
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Old 03-08-20, 15:11
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I believe it is the second one.
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Old 03-08-20, 15:30
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That is certainly my gut feeling. I am wrong, or used they to tell you, before they last improved the system, the figure to several decimal places?
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Old 03-08-20, 16:24
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They did used to, yes.
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Old 04-08-20, 06:06
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And they have done again! At least we can see which ones are for the chop now.
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Old 04-08-20, 09:33
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Okay, when I filter by amount of shared DNA now and put 8 to 8, it is showing me 8.0 to 8.9, but it must have been showing 7.5 to 8.5 before, because I had started adding the "8 to 8"s with linked public trees into a group, and none of the 8.9 ones are in that group.
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Old 04-08-20, 10:22
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Quite right, Kite. The 8S that I worried about are showing as 7.5-7.6. I didn't manage to group any more.
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Old 06-08-20, 00:36
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Anything up to 7.9 will go and over 8 will stay?
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Old 06-08-20, 06:19
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That's my understanding. Interestingly, 6cM previously seems to hae been 6 - 6.5 cM.
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Old 08-08-20, 15:30
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At some point before they started showing a decimal point, I had started adding those in the 8 - 8 category to a group, and now I see that none of those now shown as 8.5 are in the group, but all shown as 8.4 are. So I think they are showing the first digit after the decimal point rather than rounding, for instance if it is 8.499 it is showing as 8.4. In which case if it is 7.999 it should be showing as 7.9.
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