The following data show the curb weight, horsepower, an 1/4 - mile speed for 16
ID: 3433724 • Letter: T
Question
The following data show the curb weight, horsepower, an 1/4 - mile speed for 16 popular sports and GT cars. Suppose that the price of each sports and GT car is also available. The complete data set is as follows.
Sports & GT car Price Curb wgt. HP Speed 1/4
Accura integra type r 25,035 2577 195 90.7
Accura NSX-T 93,758 3066 290 108
BMW Z3 2.8 40,900 2844 189 93.2
Chevy Camaro Z28 24,865 3439 305 103.2
Chevy Corvette 50,144 3246 345 102.1
Dodge Viper RT/10 69,742 3319 450 116.2
Ford Mustang GT 23,200 3227 225 91.7
Honda Prelude Type SH 26,382 3042 195 89.7
Mercedes-Benz CLK320 44,988 3240 215 93
Mercedes-Benz SLK 320 42,762 3025 185 92.3
Mitsubishi 3000GT VR-4 47,518 3737 320 99
Nissan 240SX SE 25,066 2862 155 84.6
Pontiac Firebird Trans AM 27,770 3455 305 103.2
Porsche Boxster 45,560 2822 201 93.2
Toyota Supra Turbo 40,989 3505 320 105
Volvo C70 41,120 3285 236 97
A. Find the estimated regression equation, which uses price and orsepower to predict 1/4 mile speed.
B. Plot the standardized residuals against y. Does gthe residual plot support the assumption about E? Explain
C. Check for any outiers. What are your conclusions?
D. Are there any influential observation? Explain.
Explanation / Answer
a)
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