A consumer organization examined the relationship between the weight of a car (in thousands of pounds) and the fuel efficiency (in miles per gallon or mpg). Part of the regression analysis is shown to the right, where the response variable is Fuel efficiency. Complete a and b below. Dependent variable is: Fuel Efficiency R squared = 75.6% s = 2.612 with 50 2 = 48 df Variable nbsp Coeff nbsp Coeff nbsp SE left parenthesis Coeff right parenthesis nbsp SE(Coeff) Intercept 47.57 2.04 Weight nbsp 8.26 0.66 Mean weight = 2755 pounds