. Author manuscript; available in PMC: 2014 Jun 1.

Published in final edited form as: Dev Psychol. 2012 Apr 30;49(6):1174–1186. doi: 10.1037/a0028400

Table 1. Descriptive Statistics.

Variables	Males		Females
	Mean (SD)	Range	Mean (SD)	Range
Child's Aggression, first grade	1.2 (1.1)	0 to 5	.80 (.93)	0 to 4.8
Child's Aggression, third grade	1.3 (1.1)	0 to 4.9	.81 (.86)	0 to 4.4
Peer dislike	-.05 (.27)	-.85 to .88	-.16 (.23)	-.88 to .71
Friends' Aggression	1.1 (.61)	0 to 3	.57 (.49)	0 to 3
Classroom Aggression	1.1 (.45)	0 to 2.2	1.1 (.44)	0 to 2.2

NOTE: Mean levels for boys and girls are significantly different (p < .05) for all variables except Classroom Aggression, which is not significantly different.