For Exercises 2.44 and 2.45, see page 82; for 2.46, see page 84; for 2.47, see page 86; for 2.48 and 2.49, see page 88; for 2.50, see page 90; for 2.51, see page 90; for 2.52, see page 91; and for 2.53, see page 94.

Question 2.67

2.67 Predicted values and residuals

Refer to the previous two exercises.

beer

  1. Make a plot of the residuals versus percent alcohol.
  2. Interpret the plot. Is there any systematic pattern? Explain your answer.
  3. Examine the plot carefully and determine the approximate location of New Belgium Fat Tire. Is there anything unusual about this case? Explain why or why not.

2.67

(b) The residual plot looks fairly random. (c) There is nothing unusual about the location of New Belgium Fat Tire.