The following model was fitted to data on thirty-two large bank holding companies." y=7.62-016x + 1.23x R-37 where v=Price-earnings ratio (.008) (.496) Size of total bank assets, in billions of dollars x Dummy variable, taking the value 1 for regional banks, and 0 for money center banks

(a) Interpret the estimated coefficient on the dummy variable.

(b) Test against a two-sided alternative the null hypothesis that the true coefficient on the dummy variable is 0.1

(c) Test at the 5% significance level the null hypothesis B B = 0, and interpret your result.