Corrigendum

Figures & data

Table IX.  Mean age of children ‘in a stage’ of M₃ Africans, N = 756, 390 boys, 335 girls and 31 unknown sex. For 431 individuals age was recorded in years only and was assumed to be on the half year–minimum/maximum age must be interpreted with this in mind. Stage 12 R34 significantly different: girls earlier than boys, all others ns.

	Boys						Girls						Combined sex
M3	Mean	SE	SD	n	Min.	Max.	Mean	SE	SD	N	Min.	Max.	Mean	SE	SD	N	Min.	Max.
Crypt	7.91	0.40	1.32	11	6.40	10.87	7.74	0.55	1.83	11	4.85	10.50	7.78	0.29	1.46	26	4.85	10.87
Ci	8.65	0.23	1.00	19	7.10	11.18	8.41	0.40	1.49	14	6.50	11.50	8.55	0.21	1.22	33	6.50	11.50
Cco	8.92	0.23	1.12	23	6.50	11.50	9.52	0.31	1.10	13	7.50	11.50	9.15	0.19	1.20	40	6.50	11.50
Coc	10.03	0.39	1.29	11	7.50	11.70	10.27	0.49	1.39	8	8.50	12.50	10.13	0.30	1.30	19	7.50	12.50
C1/2	11.18	0.33	1.76	28	7.64	14.62	11.11	0.24	1.21	26	9.06	13.50	11.17	0.20	1.50	55	7.64	14.62
C3/4	12.47	0.28	1.58	32	9.50	15.50	11.88	0.27	1.46	30	8.50	15.50	12.17	0.19	1.53	64	8.50	15.50
Cc	13.27	0.39	1.04	7	11.63	14.50	13.83	0.76	2.84	14	10.50	18.56	13.50	0.46	2.26	24	10.50	18.56
Ri	14.67	0.57	1.80	10	12.50	18.50	13.72	0.53	1.92	13	11.00	17.50	14.13	0.39	1.89	23	11.00	18.50
Rcl	13.50	0.26	0.68	7	12.51	14.53	14.22	0.72	1.25	3	13.50	15.66	13.72	0.28	0.88	10	12.51	15.66
R1/4	15.53	0.39	1.89	23	12.50	18.50	14.65	0.27	1.45	28	11.24	17.51	15.06	0.23	1.68	55	11.24	18.50
R1/2	16.82	0.31	1.53	24	13.50	19.91	15.95	0.36	1.60	20	12.80	19.09	16.41	0.24	1.68	47	12.80	19.91
R3/4	17.84	0.37	1.75	22	14.89	22.50	16.59	0.27	1.29	22	13.50	18.82	17.22	0.24	1.62	45	13.50	22.50
Rc	18.26	0.27	1.18	19	15.50	20.30	18.42	0.29	1.26	19	15.69	20.59	18.34	0.19	1.19	39	15.50	20.59
A12	18.78	0.26	1.05	17	16.72	20.29	18.40	0.28	1.17	18	16.50	20.73	18.56	0.19	1.11	36	16.50	20.73
Ac				102	13.98					71	13.50					176	13.50