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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, the 0 to 60 miles per hour acceleration time of a coupe is predicted to be 0.7679 seconds higher than that of a sedan.
Heavy Drinking
The consumption of alcoholic beverages in large quantities over a short period of time, potentially leading to health and social problems.
Daily Showers
The routine act of bathing oneself on a daily basis to maintain personal hygiene and health.
Learned Helplessness
Learned helplessness is a psychological condition where an individual learns to believe they are powerless to change a negative situation, even when opportunities to do so exist.
Controllability
The degree to which an individual can influence or manage the outcomes or conditions in their life or environment.
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