Table 1.

Average group and helper sizes as well as sex ratios in the 11 related and the 11 unrelated groups in the laboratory.

factors	related groups	unrelated groups	test statistics	p
group size	6.5	6.5	60.5	>0.99
(max–min)	(3–10)	(3–10)
body length (in mm)	47.0	47.0	57.0	0.81
(min–max)	(34–54)	(39–57)
sex ratio
groups with male bias	7	5	1.01	>0.50
groups with female bias	2	2
groups with equal sex ratios	2	4

Mann–Whitney U-statistics were conducted on the group size and helper size data and a log–linear analysis was performed on the sex ratio data. None of these factors differed between related and unrelated groups.