Question 2 Based on data from the U.S. for the period 1965 to 2006 (42 observations), we have the following regression results. GNP = -955.51 + 8.750 M R2 = 0.948 se = ) (0.321) t = (-3.826) ( where GNP is the gross national product ($, in billions) and M is the money supply ($, in billions). [25% for each sub-question.] a) Fill in the blank parentheses. Are the coefficients significant at the 5% level based on the t-test? The critical value for the t-test is 2.02 at the 5% level. b) Conduct the hypothesis test with Ho : B1 = 8 (null hypothesis) and H1 : B1 # 8 (alternative hypothesis) at the 5% level. Note that B, is the parameter for M. c) Derive the confidence interval of the slope coefficient at the 5% level and interpret the result. d) What is the interpretation of the estimated slope? What is the main research question based on this model? O 99+ W 21