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TABLE 13-16
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 multiple determination for the regression model using each of the 5 variables Xj as the dependent variable and all other X variables as independent variables (Rj2) are, respectively, 0.7461, 0.5676, 0.6764, 0.8582, 0.6632.
-Referring to Table 13-16, there is enough evidence to conclude that Cargo Vol makes a significant contribution to the regression model in the presence of the other independent variables at a 5% level of significance.
Accommodation
In cognitive development, the process of altering one's existing schemas or ideas as a result of new information or experiences.
Schema
A cognitive framework or concept that helps organize and interpret information, forming the basis of understanding experiences.
Secondary Circular Reactions
Secondary circular reactions are a developmental phase in infants, occurring around 4-8 months, characterized by the repetition of actions that produce effects outside the body, showing an early awareness of cause and effect.
Sensorimotor
The first stage in Piaget's theory of cognitive development, where infants learn through interacting with the environment, from birth to about 2 years of age.
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