Question

Please help with regression problem! Multiple choice

A researcher is interested to find out how the engine displacement vehicle weight, and the type of transmission [i.e. automatic & manual] affect the automobile gasoline mileage. Type of transmission is represented by one dummy variable: automatic (-1, if transmission is automatic; 0, if transmission is manual) Part of the raw data and the regression output of 40 different car models are given below. cementícubic Weightlb)l Trans Automobile Miles/gallon Displacement(cubic in) Corvette 22.50 x Cruiser 19.30x Omega x Novax 440 514 Corolla E5 x 5911 x Cougar x 3800x Starfire x Cordobax SUMMARY OUTPUT

Answer 1

y^= 45.768 - 0.0176 * displacement - 0.00361 * weight -0.654 * Automatic Transmission

{Note the coefficient}

here

displacement = 250 , weight = 3000 , Automatic Transmission = 1

y^= 45.768 - 0.0176 *250 - 0.00361 * 3000-0.654 * 1

= 29.884

option D) 29.88 is correct

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