	最小二乘	岭回 $λ = 18.437$	向前逐步	向后逐步	Lasso回归 $λ = 2.553$
Intercept	−137.765	−266.701	34.198	34.198	−32.644
x₁	−0.017	0.184			0.315
x₂	0.091	0.038	0.083	0.083
x₃	−0.021	0.002
x₄	0.004	0.003	0.002	0.002	0.002
x₅	0.309	0.281
x₆	0.016	0.030
x₇	0.137	0.022	0.151	0.151	0.092
x₈	−2.358	0.394	−2.480	−2.480
x₉	0.055	0.206			0.054
x₁₀	−76.335	27.305
MSE	570.016	118.906	554.354	554.354	110.216
RMSE	23.875	10.904	23.545	23.545	10.498