Table 10

Summary Statistics for Experimental Lalonde Data

Experimental Controls (Nc = 260)Trainees (Nt = 185)
CovariateMean(Standard Deviation)Mean(Standard Deviation)t-statnor-dif
Black   0.83(0.38)   0.84(0.36)   0.5   0.04
Hispanic   0.11(0.31)   0.06(0.24)−1.9−0.17
Age25.05(7.06)25.82(7.16)   1.1   0.11
Married   0.15(0.36)   0.19(0.39)   1.0   0.09
No degree   0.83(0.37)   0.71(0.46)−3.1−0.30
Education10.09(1.61)10.35(1.97)   1.4   0.14
E’74   2.11(5.69)   2.10(4.89)−0.0−0.00
U’74   0.75(0.43)   0.71(0.46)−1.0−0.09
E’75   1.27(3.10)   1.53(3.22)   0.9   0.08
U’75   0.68(0.47)   0.60(0.49)−1.8−0.18