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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,what is the correct interpretation for the estimated coefficient for MPG?
Wins
Achievements or successes in a competition or challenge.
Income-Utility Curves
Graphical representations showing how changes in income affect an individual's level of satisfaction or utility, holding other factors constant.
Risk Preferences
Denote an individual's or entity's tolerance for risk, influencing decision-making in uncertain situations.
Expected Value
The calculated average of all possible outcomes of a random variable, weighted by their probabilities.
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