Candy bars with nuts The data on candy bars per serving from Exercise 16 also has information on whether the candy bar has nuts. The variable Nuts is coded 0 for candy bars without nuts and 1 for those with nuts. Here’s the regression model of Exercise 16 with Nuts added:

a) What is a proper interpretation of the coefficient of Nuts in this regression?

b) Did adding Nuts improve the regression model? Explain.