Variable

Coefficient

Std.Error

t-Statistic

Prob

C

1.787970

0.199537

8.960593

0.0029

L n ( X 1 )

−0.894212

0.325156

2.780859

0.0689

L n ( X 2 )

0.418769

0.284364

−1.507819

0.1987

L n ( X 3 )

−0.388306

0.084024

−4.621379

0.0191

R2 = 0.992936F = 140.5677 DW = 2.025778 P = 0.001006