Question: An early edition of Car and Driver magazine reported the
An early edition of Car and Driver magazine reported the engine horsepower, top speed (mph), curb weight (pounds), and 0–60 mph acceleration time (seconds) for a selection of automobiles that ranged from large American “muscle cars” to small economy imports. The data are in file XR17009. Using y = 0–60 time and x = horsepower, fit a second-order polynomial model and predict the 0–60 time for a car with 300 horsepower. At the 0.05 level of significance, is the regression equation significant?
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