Mathematics, 20.12.2019 04:31 Xlhoncho45
The department of energy and the us environmental protection agency's 2012 fuel economy guide provides fuelefficiency data for 2012 model year cars and trucks (department of energy website. april 16. 2012). the file named2012fuelecon provides a portion of the data for 309 cars. the column labeled manufacturer shows the name of thecompany that manufactured the car; the column labeled displacement shows the engineās displacement in liters; thecolumn labeled fuel shows the required or recommended type of fuel (regular or premium gasoline); the column labeleddrive identifies the type of drive [f for front wheel. r for rear wheel. and a for all wheel); and the column labeled hwympg shows the fuel efficiency rating for highway driving in terms of miles per gallon. a. develop an estimated regression equation that can be used to predict the fuel efficiency for highway driving given theengineās displacement. test for signiļ¬cance using a = .05.b. consider the addition of the dummy variable fuelpremium, where the value of fuelpremium is 1 if the required orrecommended type of fuel is premium gasoline and 0 if the type of fuel is regular gasoline. develop the estimatedregression equation that can be used to predict the fuel efficiency for highway driving given the engineās displacementand the dummy variable fuelpremium. c. use a = .05 to determine whether the dummy variable added in part (b) is signiļ¬cant. d. consider the addition of the dummy variables frontwheel and rearwheel. the value of frontwheel is 1 if the car hasfront wheel drive and 0 otherwise: the value of rearwheel is 1 if the car has rear wheel drive and 0 otherwise. thus, for acar that has all-wheel drive, the value of frontwheel and the value of rearwheel is 0. develop the estimated regressionequation that can be used to predict the fuel efficiency for highway driving given the engineās displacement. the dummyvariable fuelfāremium. and the dummy variables frontwheel and rearwheel. e. for the estimated regression equation developed in part (d), test for overall significance and individual significance usinga = .05.
Answers: 2
Mathematics, 21.06.2019 17:30
If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 Ć 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)
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Mathematics, 21.06.2019 18:00
Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)
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Mathematics, 21.06.2019 22:00
You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?
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Mathematics, 21.06.2019 23:00
Solve for n. round to the tenths place, if necessary. 14.2 cups of flour6 loaves of bread= 20 cups of flour n
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The department of energy and the us environmental protection agency's 2012 fuel economy guide provid...
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