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. 2003 Apr 29;72(6):1370–1388. doi: 10.1086/375453

Table 3.

Distribution of Number of Offspring to Parents

	Ancestor Cohort
	1848–1892		1698–1742
Statistic	Matrilines	Patrilines	Matrilines	Patrilines
Mean	1.63	1.65	1.59	1.61
Variance	.763	.785	.727	.752
Coefficient of variation	53.73	53.71	53.63	53.84
N^a	76,505	73,411	60,910	72,010

^a

N = number of parents born prior to 1972.