Table A2.

t Tests for Recursive Partitioning Results

Leaf Legend	Leaf	1	2	3	4	5	6	7	8	9	10
L1: mothers’ education < 12	1
L2: L1 & number of siblings ≥ 2	2	−.67
L3: L2 & low control ≥ 10	3	−1.94	1.30
L4: L2 & low control < 10	4	−.45	−.94	−1.89
L5: L4 & female	5	.34	−.10	−.97	.63
L6: L4 & male	6	−.86	−1.22	−1.93	−.47	−.96
L7: L1 & number of siblings < 2	7	−1.59	−1.92	−2.55	−1.17	−1.60	−.65
L8: mother’s education ≥ 12	8	−2.19	−3.04	−4.41	−.91	−1.60	−.09	.77
L9: L8 & ASVAB scale < −.44	9	1.91	1.30	.06	1.89	.99	1.94	2.55	4.18
L10: L8 & ASVAB scale ≥ −.44	10	−2.99	−.94	−5.13	−1.44	−2.06	−.05	−.43	−1.25	4.86

Note: Data are from the National Longitudinal Survey of Youth 1979 cohort. The sample is restricted to individuals who were 14 to 17 years old at the baseline survey in 1979 (n = 5,582), who had completed at least the 12th grade (n = 4,548), and who had no missing data on the outcome (n = 4,382). College completion is measured as a 4-year degree completed by age 25. Cells indicate unequal-variances t-test values for tests of difference between each of the pairs of leaves represented by the leaf number. ASVAB = Armed Services Vocational Aptitude Battery; L = leaf.