Answers for Questions, page 814

  1. 1. 308.8 − 17.7 − 106.9 + 182.1 = 366.3. Mean for Midwest, Small labor in Table 1.

  2. 3. The interaction remains visible (lines are not parallel).

    A line graph shows regional differences in price and price partition. The four lines are not parallel.
  3. 5. Estimates change slightly; standard errors no longer match.

  4. 7.

    1. Economy vehicles get significantly higher average ratings (7.26) compared to standard (5.89) or premium (6.02).

    2. European brands earn statistically significantly higher rating (7.18) than Asian (6.23) or U.S. (6.24) brands.

  5. 9. Estimated rating = 6.3293 − 0.3293 + 1.6707 − 3.6172 = 4.0535

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