A department store manager randomly sampled customers who shopped in her store. She recorded the number of minutes each customer spent in the store and then asked the customers how many miles they traveled to get to the store from their home. These data are in a file called Shopping.

a. Develop a regression model using the miles traveled as the independent variable to explain the variation in the number of minutes the customer spends in the store.

b. What percentage of the variation in the dependent variable is explained by the independent variable?
c. Using an alpha = 0.05 level, test whether the regression slope coefficient is statistically significant.