Question

Lead = 25,149 – 1.58G + 0.0003G² – 11,476D₈₃ + 8.97D₈₃G –

(9,435)     (2.89)    (0.0002)      (3,623)        (2.36)          

0.0008D₈₃G²            

          (0.0002)

                        + 38.4(popdensity) – 308(year)

                        (14.5)                      (148)

where D₈₃ represents 1 for the post-1983 period and zero for the pre-1983 period

R² = 0.68

                        N = 528

F-Test of hypothesis that all time-interaction coefficients equal

to zero = 5.14

(b) Which of the variables are statistically significant at a 5% significance level in the above Equation?

Answer 1