Table 1.

Informal Mentoring and Education: Descriptive Statistics

	Mean	SD	Min	Max
12th Grade GPA a	2.75	.73	0	4
Highest Degree Achieved	2.71	1.08	1	5
Age	21.72	1.82	18	27
Female	.49	.50	0	1
Private School	.07	.26	0	1
Extracurricular Activities	1.64	2.12	0	15
Work
0 hours	.47	.50	0	1
1 - 20 hours	.41	.49	0	1
21+ hours	.12	.32	0	1
Social Background
Race-ethnicity
White	.65	.48	0	1
Black	.16	.36	0	1
Asian	.04	.20	0	1
Hispanic	.12	.32	0	1
Native American	.03	.17	0	1
Neighborhood Disadvantage	.55	.43	0	3
Neighborhood Disadvantage - Missing	.14	.35	0	1
Parental Resources
Family Income (in $1,000)	45.82	40.74	0	999
Family Income - Missing	.21	.41	0	1
Parent in PTA	.33	.44	0	1
Parent in PTA - Missing	.12	.32	0	1
2-Parent Biological	.57	.49	0	1
Highest Parent’s Education	2.80	1.01	0	4
Relationship with Parents	3.26	.66	1	4
Peer Resources
Number of Friends	6.43	3.46	0	10
Friends’ Mean 9th Grade GPA	2.86	.43	0	4
Friends’ Mean 9th Grade GPA - Missing	.39	.49	0	1
Friends’ Mean Wave I GPA	2.89	.53	1	4
Peer Network Centrality	.83	.52	0	4
Peer Network Centrality - Missing	.32	.47	0	1
School Resources
Student/Teacher Environment	3.60	.14	3	4
Student/Teacher Environment - Missing	.28	.45	0	1
Average Class Size	25.60	4.94	10	39
School Size	2.22	.71	1	3
Personal Resources
Physical Attractiveness	3.57	.86	1	5
Personality Attractiveness	3.60	.83	1	5
College Aspirations	4.44	1.02	1	5
Picture Vocabulary Test	100.55	14.09	10	137
Picture Vocabulary Test - Missing	.05	.22	0	1
9th Grade GPA	2.60	.89	0	4
Wave I GPA	2.89	.75	1	4
Mentoring
Mentor	.75	.44	0	1
Social Role
Relative	.26	.44	0	1
Teacher	.19	.39	0	1
Friend	.13	.34	0	1
Community	.16	.37	0	1

Notes: N = 12,621.

^aValid N = 9,216