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Edward B. Walker (1756-1838)/comparison

< Edward B. Walker (1756-1838)

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A total of six YDNA test results are available for the group that includes persons descended from or related to Meadow Creek John Walker. Twelve such results are available for the group that includes descendants of Edward B. Walker. A "centroid" marker set can be defined for each group. These centroid sets ignore the small variations that are found in individual test results. Use of characteristic centroid marker sets facilitates inter-group comparisons. A comparison of the amount of variation that is contained in the original data set for each group is of interest. Small amounts of variation in the markers contained within a group (Intra-group variance) indicate a MRCA that is relatively recent. The more intra-group variance, the furthr back the MRCA.

Looking just at the Edward B Walker group, 14 test results were available. Comparing individual test results with the group centroid 7 step-wise differences were found out of 37 markers. The average variance between each individual test and the group centroid, is estimated as 1.4% (7 markers , 14 tests, 37 markers each test. Similarly, the Meadow Creek John Walker group shows a variance of 2.3% (5 markers different, 6 tests, 37 markers each test. The two centroids, however, show a much larger variance of 20.3% (15 markers differnt, 2 tests of 37 markers each).

The slight intragroup variances show that each group has a relatively recent common ancestor. The large INTRA-group variance between the two centroid data sets, howver, shows that the common ancestor for the two groups is much further back. Despite the fact that a family belonging to each of these groups were living in very close proximity to each other on Horse Creek, they have no genealogically meaningful relationship.


George B. Walker line MCJW Line Comparison
14 13 1
23 23 0
14 14 0
11 11 0
11 12 1
14 14 0
12 12 0
12 12 0
12 10 2
13 13 0
13 13 0
29 29 0
17 18 1
9 9 0
10 10 0
11 11 0
11 11 0
25 25 0
15 15 0
19 19 0
29 32 3
15 15 0
15 15 0
17 17 0
18 17 1
11 11 0
11 11 0
19 19 0
23 23 0
17 17 0
15 16 1
18 16 2
17 17 0
36 38 2
38 39 1
12 12 0
12 12 0

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