reg tax

F(1, 28) = 3989.11 R-squared = 0.9930

gdp

Prob > F = 0.0000 Adj R-squared = 0.9928

tax

Coef.

Std. Err.

t

P > t

95% CI下限

95% CI上限

gdp

0.1778613

0.0028161

63.16

0.000

0.1720928

0.1836297

_cons

−2901.125

1 .121

−2.40

0.023

−5373.801

−428.4497