E5.2 Using the data set Growth described in Empirical Exercise 4.1, but excluding the data for Malta, run a regression of Growth on TradeShare.

a. Is the estimated regression slope statistically significant? This is, can you reject the null hypothesis H0: b1 = 0 vs. a two-sided alternative hypothesis at the 10%, 5%, or 1% significance level?

b. What is the p-value associated with the coefficient’s t-statistic?

c. Construct a 90% confidence interval for b1.