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SCENARIO 18-9
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.
The various residual plots are as shown below.
The coefficient of partial determination ( R2 yj.(All variables except j ) )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 X j as the dependent variable and all other X variables as independent variables ( R2 j )are,respectively, 0.7461,0.5676,0.6764,0.8582,0.6632.
-Referring to Scenario 18-9,the 0 to 60 miles per hour acceleration time of a sedan is predicted to be 0.7679 seconds higher than that of an SUV.
Gender Typing
The method through which a child recognizes their own gender identity and subsequently aligns their behavior, adopting the values and characteristics typical of the gender they associate with.
Secondary Sex Characteristics
Physical features that distinguish the sexes of a species, emerging at puberty but not directly involved in reproduction, such as facial hair in males or breasts in females.
Menarche
The first occurrence of menstruation in a female, marking the onset of fertility.
Androgyny
Androgyny is a state or condition in which an individual possesses both masculine and feminine characteristics, qualities, or traits.
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