SCENARIO 14-14 An automotive engineer would like to be able to predict automobile mileages.She believes that the two most important characteristics that affect mileage are horsepower and the number of cylinders (4 or 6)of a car.She believes that the appropriate model is where = horsepower = 1 if 4 cylinders, 0 if 6 cylinders Y = mileage.
-Referring to Scenario 14-14, the fitted model for predicting mileages for 6-cylinder cars is ________.
A)40 -
B)40 -
C)60 -
D)60 -

Question

SCENARIO 14-14 An automotive engineer would like to be able to predict automobile mileages.She believes that the two most important characteristics that affect mileage are horsepower and the number of cylinders (4 or 6)of a car.She believes that the appropriate model is  where  = horsepower  = 1 if 4 cylinders, 0 if 6 cylinders Y = mileage.
-Referring to Scenario 14-14, the fitted model for predicting mileages for 6-cylinder cars is ________.
A)40 - 
B)40 - 
C)60 - 
D)60 -

Quizplus · Accepted Answer

Since the model variable for 6-cylinder cars is 0, the intercept for the 6-cylinder cars can be found by subtracting the coefficient of the 6-cylinder variable from the overall intercept, which is 40. Therefore, the fitted model for predicting mileages for 6-cylinder cars is 40 - 11ebc114_12bb_b480_8acb_f767eb9b5a6b_TB8562_11. Since the model is 11ebc114_12bb_8d6d_8acb_81a4a0304676_TB8562_11, the coefficient for the number of cylinders of a 6-cylinder car is -20. Therefore, the fitted model for predicting mileages for 6-cylinder cars is 40 - 20(0) = 40.

SCENARIO 14-14 an Automotive Engineer Would Like to Be Able