The Toyota Camry is one of the best-selling cars in North America. The cost of a previously owned Camry depends on many factors, including the model year, mileage, and condition. To investigate the relationship between the car's mileage and the sales price for Camrys, the following data show the mileage and sale price for 19 sales (PriceHub web site, February 24, 2012). DATA file

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Chapter10: Statistics
Section10.2: Representing Data
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The Toyota Camry is one of the best-selling cars in North America. The cost of a previously owned Camry depends on many factors, including the
model year, mileage, and condition. To investigate the relationship between the car's mileage and the sales price for Camrys, the following data
show the mileage and sale price for 19 sales (PriceHub web site, February 24, 2012).
DATA file
Miles (1,000s)
Price ($1,000s)
22
16.2
29
16.0
36
13.8
47
11.5
63
12.5
77
12.9
73
11.2
87
13.0
92
11.8
101
10.8
110
8.3
28
12.5
59
11.1
68
15.0
68
12.2
91
13.0
42
15.6
65
12.7
110
8.3
Transcribed Image Text:The Toyota Camry is one of the best-selling cars in North America. The cost of a previously owned Camry depends on many factors, including the model year, mileage, and condition. To investigate the relationship between the car's mileage and the sales price for Camrys, the following data show the mileage and sale price for 19 sales (PriceHub web site, February 24, 2012). DATA file Miles (1,000s) Price ($1,000s) 22 16.2 29 16.0 36 13.8 47 11.5 63 12.5 77 12.9 73 11.2 87 13.0 92 11.8 101 10.8 110 8.3 28 12.5 59 11.1 68 15.0 68 12.2 91 13.0 42 15.6 65 12.7 110 8.3
(d) How much of the variation in the sample values of price does the model estimated in part (b) explain?
If required, round your answer to two decimal places.
53.86
(e) For the model estimated in part (b), calculate the predicted price and residual for each automobile in the data. Identify the two automobiles that were the
biggest bargains.
If required, round your answer to the nearest whole number.
The best bargain is the Camry #
12
in the data set, which has
14.82
miles, and sells for $
14.82
less than its
predicted price.
The second best bargain is the Camry #
4
in the data set, which has
14.82
miles, and sells for $
14.82
less
than its predicted price.
(f) Suppose that you are considering purchasing a previously owned Camry that has been driven 50,000 miles. Use the estimated regression equation
developed in part (b) to predict the price for this car.
If required, round your answer to one decimal place. Do not round intermediate calculations.
Predicted price: $
14149
Is this the price you would offer the seller?
Yes
Explain.
Transcribed Image Text:(d) How much of the variation in the sample values of price does the model estimated in part (b) explain? If required, round your answer to two decimal places. 53.86 (e) For the model estimated in part (b), calculate the predicted price and residual for each automobile in the data. Identify the two automobiles that were the biggest bargains. If required, round your answer to the nearest whole number. The best bargain is the Camry # 12 in the data set, which has 14.82 miles, and sells for $ 14.82 less than its predicted price. The second best bargain is the Camry # 4 in the data set, which has 14.82 miles, and sells for $ 14.82 less than its predicted price. (f) Suppose that you are considering purchasing a previously owned Camry that has been driven 50,000 miles. Use the estimated regression equation developed in part (b) to predict the price for this car. If required, round your answer to one decimal place. Do not round intermediate calculations. Predicted price: $ 14149 Is this the price you would offer the seller? Yes Explain.
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