In Problem 13.5 on page 531, you used the summated rating to predict the cost of a restaurant meal. Perform a residual analysis for these data (stored in Restaurents). Evaluate whether the assumptions of regression have been seriously violated.
In problem
Zagat's publishes restaurant ratings for various locations in the United States. The file Restaurants contains the Zagat rating for food, décor, service, and the cost per person for a sample of 100 restaurants located in NewYork City and in a suburb of NewYork City. Develop a regression model to predict the price per person, based on a variable that represents the sum of the ratings for food, décor, and service.