For Exercise 11.33, see page 550; for 11.34 and 11.35, see page 554; for 11.36 and 11.37, see page 555; for 11.38, see page 558; for 11.39, see page 559; and for 11.40 and 11.41, see pages 560–561.

Question 11.37

11.37 Predicting U.S. movie revenue.

CASE 11.2 The movie Kick-Ass was released during this same time period. It had a budget of $30.0 million and was shown in 3065 theaters, grossing $19.83 million during the first weekend. Use software to construct the following.

  1. A 95% prediction interval based on the model with all three explanatory variables.
  2. A 95% prediction interval based on the model using only opening-weekend revenue and budget.
  3. Compare the two intervals. Do the models give similar predictions and standard errors?

11.37

(a) (−25.5155, 158.2017). (b) (−28.0993, 154.2410). (c) The intervals are quite close; the first model gives a little wider interval because it has a little more standard error for prediction.

movies