Instruction 13 -Referring to Instruction 13

question 210

Multiple Choice

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 6-cylinder cars is______.

• A)60 - 0.10X₁
• B)40 - 0.10X₁
• C)40 - 0.05X₁
• D)60 - 0.15X₁

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Definitions:

SRY Gene

A gene on the Y chromosome that triggers male development, including the formation of testes, in mammals.

Homologous Chromosomes

In a nucleus, pair of chromosomes that have the same length, shape, and genes.

Duchenne Muscular Dystrophy

A genetic disorder characterized by progressive muscle degeneration and weakness due to alterations of a protein called dystrophin that helps keep muscle cells intact.