Question: Determine the following values:
n = 479
Σ HP = 116,553
Σ MPG = 9,346
Σ (HP2) = 32,654,855
Σ (MPG2) = 196,038
Σ (HP x MPG) = 2,109,130
Using x = gasoline mileage & y = horsepower, perform the hypothesis test to determine whether the slope of the regression line for the population is equal to zero at the one percent level of significance.
[A] Why did you get the same or different answers in parts A & G?
[B] Compare your observed values of the test statistic in parts F & G. What conclusion do you reach from this comparison?