13.12 Predicting average monthly visitor satisfaction Refer to Exercise 13.3 about the multiple linear regression of a restaurant’s average monthly visitor satisfaction rating (y) on the monthly food quality score (x1) and the number of visitors in a month (x2). Following is the ANOVA table of the same multiple linear regression:

13.2 Practicing the Basics ANOVA table for y = average monthly visitor satisfaction rating Source DF SS MS F-Value P-Value Regression 2 7.12 3.560 131.85 0.00 Error 110 2.97 0.027 Total 112 10.09

a. Show how R2 is calculated from the SS values and report its value.

b. Interpret the R2 value. Does the multiple regression equation help us predict the average monthly visitor satisfaction rating much better than we could without knowing that equation?

c. Find the multiple correlation. Interpret.