Question: Consider the simple regression model fi t to the National Football League team performance data in Problem 2.1. a. Construct a normal probability plot of

Consider the simple regression model fi t to the National Football League team performance data in Problem 2.1.

a. Construct a normal probability plot of the residuals. Does there seem to be any problem with the normality assumption?

b. Construct and interpret a plot of the residuals versus the predicted response.

c. Plot the residuals versus the team passing yardage, x2 . Does this plot indicate that the model will be improved by adding x2 to the model?

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