According to data from a large and representative survey of the American people, the Pearson's r correlation coefficient between education and...

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a) Interpret the substantive meaning of the coefficient on Physicians. (2 points)

b) Professor Harambe compares the standard errors for the coefficients on Capacity and Dictatorship and concludes that we are much more confident in rejecting the null hypothesis in the case of Capacity. Is he correct? Explain your answer. (4 points)

c) Interpret the substantive meaning of the estimated intercept. In other words, what does it mean in terms of the predicted level of infant mortality? (2 points)