Table 1  Mean and variance (in parentheses) of observed summary statistics over all 242 fragments
Africa (n = 12)Europe (n = 12)North America (n = 37)Africa (no singletons)Europe (no singletons)North America (no singletons)
No. of segregating sites Sn17.55 (81.31)6.35 (29.31)13.10 (50.22)10.70 (42.45)4.11 (18.30)7.47 (29.57)
Watterson’s ΘW5.91 (9.40)2.11 (3.30)3.22 (3.12)3.57 (4.72)1.36 (2.01)1.83 (1.79)
Πn5.13 (9.06)2.18 (4.81)2.52 (3.64)3.92 (6.35)1.36 (2.56)2.05 (3.16)
Tajima’s D−0.67 (0.34)−0.09 (1.43)−0.77 (1.05)0.33 (0.43)−0.006 (1.56)0.21 (1.15)
No. of haplotypes K9.46 (5.26)3.87 (3.71)10.31 (23.24)8.09 (9.47)2.85 (2.62)6.98 (19.25)
Kelly’s ZnS0.15 (0.01)0.43 (0.075)0.21 (0.055)0.23 (0.03)0.53 (0.08)0.38 (0.16)