Instruction 13.41
An automotive engineer would like to be able to predict automobile fuel economy. She believes that the two most important characteristics that affect economy are engine power and the number of cylinders (4 or 6) of a car. She believes that the appropriate model is
$\begin{array}{l}Y = 40 - 0.05 X _ { 1 } + 20 X _ { 2 } - 0.1 X _ { 1 } X _ { 2 }\\\\\text { where } \begin{aligned}X _ { 1 } & = \text { engine power } \\X _ { 2 } & = 1 \text { if } 4 \text { cylinders, } 0 \text { if } 6 \text { cylinders } \\Y & = \text { economy expressed as kilometres. }\end{aligned}\end{array}$
-Referring to Instruction 13.41,the fitted model for predicting economy for 4-cylinder cars is ______.

Question

Instruction 13.41
An automotive engineer would like to be able to predict automobile fuel economy. She believes that the two most important characteristics that affect economy are engine power and the number of cylinders (4 or 6) of a car. She believes that the appropriate model is

\begin{array}{l}Y = 40 - 0.05 X _ { 1 } + 20 X _ { 2 } - 0.1 X _ { 1 } X _ { 2 }\\\\\text { where } \begin{aligned}X _ { 1 } & = \text { engine power } \\X _ { 2 } & = 1 \text { if } 4 \text { cylinders, } 0 \text { if } 6 \text { cylinders } \\Y & = \text { economy expressed as kilometres. }\end{aligned}\end{array}

-Referring to Instruction 13.41,the fitted model for predicting economy for 4-cylinder cars is ______.

Quizplus · Accepted Answer

The Answer of Instruction 13.41 An automotive engineer would like to be able to predict automobile fuel economy. She believes that the two most important characteristics that affect economy are engine power and the number of cylinders (4 or 6) of a car. She believes that the appropriate model is $\begin{array}{l} Y = 40 - 0.05 X _ { 1 } + 20 X _ { 2 } - 0.1 X _ { 1 } X _ { 2 }\\ \text { where } \begin{aligned} X _ { 1 } & = \text { engine power } \ X _ { 2 } & = 1 \text { if } 4 \text { cylinders, } 0 \text { if } 6 \text { cylinders } \ Y & = \text { economy expressed as kilometres. } \end{aligned} \end{array}$ -Referring to Instruction 13.41,the fitted model for predicting economy for 4-cylinder cars is ______. A)60 - 0.15X₁ B)40 - 0.10X₁ C)40 - 0.05X₁ D)60 - 0.10X₁

Instruction 13 -Referring to Instruction 13