TABLE 15-5 What Are the Factors That Determine the Acceleration Time (In

question 21

Short Answer

TABLE 15-5
What are the factors that determine the acceleration time (in sec.) from 0 to 60 miles per hour of a car? Data on the following variables for 171 different vehicle models were collected:
Accel Time: Acceleration time in sec.
Cargo Vol: Cargo volume in cu. ft.
HP: Horsepower
MPG: Miles per gallon
SUV: 1 if the vehicle model is an SUV with Coupe as the base when SUV and Sedan are both 0
Sedan: 1 if the vehicle model is a sedan with Coupe as the base when SUV and Sedan are both 0
The regression results using acceleration time as the dependent variable and the remaining variables as the independent variables are presented below.
ANOVA
The various residual plots are as shown below.
The coefficient of partial determination ( ) of each of the 5 predictors are, respectively, 0.0380, 0.4376, 0.0248, 0.0188, and 0.0312.
The coefficient of multiple determination for the regression model using each of the 5 variables as the dependent variable and all other X variables as independent variables ( ) are, respectively, 0.7461, 0.5676, 0.6764, 0.8582, 0.6632.
-Referring to Table 15-5, what are, respectively, the values of the variance inflationary factor of the 5 predictors?

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Definitions:

Independent Groups

A research design in which different groups of participants are assigned to experimental conditions, with each group exposed to a different level of the independent variable.

Power Steering

A system that uses hydraulic or electric assistance to reduce the effort needed to steer a vehicle.

Manual Transmission

A type of vehicle transmission that requires the driver to manually shift gears while driving.

Main Effects

The direct impact of an independent variable on a dependent variable in an experimental design, ignoring the effects of other variables.