Homework Answers
The equation which is reasonable description of the least squares regression line for the predicted highway mpg is,
Predicted highway mpg = 52.3 - 0.0067(weight)
Reason : since there exists a negative linear correlation, the slope of the equation should be negative. The intercept is 52.2 which represents the highway mpg even at 0 weight. Therefore the correct option is the one given above.
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Car Weight (pounds),
x Miles per Gallon, y
1 3,765 19
2 3,984 18
3 3,530 20
4 3,175 22
5 2,580 26
6 3,730 18
7 2,605 25
8 3,772 18
9 3,310 20
10 2,991 24
11 2,752 25
The accompanying data represent the weights of various domestic cars and their gas mileages in the city. The linear correlation coefficient between the weight of a car and its miles per gallon in the city is r= -0.97 The...
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Car Weight (pounds),
x Miles per Gallon, y
1 3,765 19
2 3,984 18
3 3,530 20
4 3,175 22
5 2,580 26
6 3,730 18
7 2,605 25
8 3,772 18
9 3,310 20
10 2,991 24
11 2,752 25
The accompanying data represent the weights of various domestic cars and their gas mileages in the city. The linear correlation coefficient between the weight of a car and its miles per gallon in the city is r= -0.97 The...
Sports car or convertible? The following table presents the fuel efficiency, in miles per gallon, for a sample of convertibles and a sample of sports cars. Convertible Model MPG Sports Model MPG BMW 328i Mitsubishi Lancer Evolution Toyota Camry Solara Ford Mustang V6 Volkswagen Eos MINI Cooper Saab 9-3 Volkswagen GTI Honda Civic Si BMW 135i 23 Mazda Mazdaspeed Subaru Impreza WRX STI 24 Send date to Excel Part 1 of 2 Part 2 of 2 (b) Find the sample...
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