Table 1.

Descriptive Statistics for Study Variables, for 6^th Grade through 9th Grade

Variable/grade	M	SD	Skewness
Good self-control6 A	56.13	9.69	-0.37
Good self-control7	52.32	10.57	-0.18
Good self-control8	51.74	10.72	-0.14
Good self-control9	52.04	10.84	-0.19
Family life events6 B	2.36	1.95	0.84
Family life events7	2.14	1.83	0.95
Family life events8	2.08	1.78	0.93
Family life events9	2.03	1.73	0.96
Adolescent events6 C	1.94	1.60	0.80
Adolescent events7	2.11	1.64	0.65
Adolescent events8	2.09	1.63	0.65
Adolescent events9	2.13	1.63	0.67
Friend substance use6 D	1.57	2.24	1.59
Friend substance use7	3.68	3.99	0.84
Friend substance use8	5.57	4.67	0.20
Friend substance use9	6.75	4.60	0.20
Adolescent sub. use6 E	0.91	1.40	2.88
Adolescent sub. use7	1.85	2.48	2.28
Adolescent sub. use8	2.95	3.53	1.76
Adolescent sub. use9	3.56	3.84	1.41

^APossible range = 15-75.

^BPossible range = 0-10.

^CPossible range = 0-9.

^DPossible range = 0-12.

^EPossible range = 0-17.