How's your mileage? Weight (in tons) and fuel economy (in mpg) were measured for a sample of
Question:
a. Compute the least-squares regression line for predicting mileage from weight.
b. Construct a residual plot. Verify that a linear model is appropriate.
c. If two trucks differ in weight by 5 tons, by how much would you predict their mileages to differ?
d. Predict the mileage for trucks with a weight of 15 tons.
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