# Question

For the Car and Driver information described in Exercise 17.9, it would seem reasonable that the number of seconds required to accelerate to 60 mph would depend on both a car’s weight and its horsepower. Further, it would be logical to assume that horsepower and weight might interact. Using data file XR17009, with y = 0–60 mph acceleration time (seconds), x1 = horsepower, and x2 = curb weight (pounds), fit a model of the form E(y) = β0 + β1x1 + β2x2 + β3x1x2. Interpret the R2 value for the model and indicate whether, at the 0.02 level, the model is significant.

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• CreatedSeptember 08, 2015
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