Model 1	Model 2	Model 3
Displacement	-0.019
	(0.010)
Horsepower		-0.038*
		(0.010)
Drive ratio			2.236
			(1.736)
Weight (1000 lbs)	-3.138*	-2.800*	-4.892*
	(1.344)	(0.942)	(0.879)
Manual	1.360	1.687	0.169
	(2.029)	(1.747)	(2.103)
Gears	-1.050	0.403	-1.085
	(1.222)	(1.065)	(1.313)
(Intercept)	37.993*	32.556*	31.718*
	(5.051)	(4.672)	(7.820)
Num.Obs.	32	32	32
R2	0.787	0.841	0.769
R2 Adj.	0.755	0.817	0.734
AIC	167.3	158.0	169.9
BIC	176.1	166.8	178.7
Log.Lik.	-77.644	-72.983	-78.950
F	24.920	35.632	22.438
* p < 0.05