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
Calculate the ninety-nine percent confidence interval find the mean gasoline mileage for 2006 cars when horsepower is 220.