. Author manuscript; available in PMC: 2010 Sep 3.

Published in final edited form as: J Abnorm Child Psychol. 2009 Jan;37(1):45–58. doi: 10.1007/s10802-008-9257-1

Table 2.

Means and Standard Deviations of Each Measure of Child Problem Behavior at 4–7 Years and Conduct Problems at 8–13 Years Among Females and Males (N = 6,466)

	Males		Females		Tests of sex differences in means^a	Test of sex differences in variances^b
	M	SD	M	SD	X²	F
Conduct Problems (4–7 Years)	2.53	2.07	2.01	1.72	130.51	1.45
Oppositional Behavior (4–7 Years)	1.73	1.39	1.61	1.34	12.87	1.07
Inattentive Hyperactive Behavior (4–7 Years)	1.94	1.41	1.50	1.29	184.82	1.20
Conduct Problems (8–13 Years)	2.47	2.20	1.80	1.74	201.59	1.60

Tested using Poisson regression; all p < .001

All sex differences in variances p < .001