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Statistics Homework Solutions 171

Statistics Homework Solutions 171 - 171 SECTION 7.2 8 9(a...

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SECTION 7.2 171 9. (a) 5 10 15 20 25 30 4 5 6 7 8 Weight Mileage The linear model is appropriate. (b) x 19 5, y 5 534286, n i 1 x i x 2 368 125, n i 1 y i y 2 9 928171, n i 1 x i x y i y 57 1075. β 1 n i 1 x i x y i y n i 1 x i x 2 0 1551307 and β 0 y β 1 x 8 55933. The equation of the least-squares line is y 8 55933 0 1551307 x . (c) By 0 1551307 5 0 776 miles per gallon. (d) 8 55933 0 1551307 15 6 23 miles per gallon. (e) miles per gallon per ton (f) miles per gallon 11. (a) 4 4.5 5 5.5
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