Child gender	Child age	Mean	Standard deviation	Correlation
Child gender	Child age	Mean	Standard deviation	8	10	12	14
Girls	8	21.1	2.0		0.76	0.76	0.76
	10	22.3	2.0			0.76	0.76
	12	23.3	2.0				0.76
	14	24.0	2.0
Boys	8	22.5	2.6		0.48	0.51	0.52
	10	24.2	2.4			0.55	0.56
	12	25.8	2.3				0.59
	14	27.4	2.3