How much would you predict their mileages to differ

Reference no: EM131008686

Inertial weight (in tons) and fuel economy (in mi/gal) were measured for a sample of seven diesel trucks. The results are presented in the following table. (From "In-Use Emissions from Heavy-Duty Diesel Vehi- cles," J. Yanowitz, Ph.D. thesis, Colorado School of Mines, 2001.)

Weight	Mileage
8.00	7.69
24.50	4.97
27.00	4.56
14.50	6.49
28.50	4.34
12.75	6.24

21.25 4.45

a. Construct a scatterplot of mileage (y) versus weight (x).

b. Compute the least-squares line for predicting mileage from weight.

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.

e. What are the units of the estimated slope βˆ1 ?

f. What are the units of the estimated intercept βˆ0 ?

Reference no: EM131008686

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