CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
13th Edition
ISBN: 9781337094399
Author: Cochran
Publisher: IACCENGAGE
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Textbook Question
Chapter 14.7, Problem 44E
Automobile racing, high-performance driving schools, and driver education programs run by automobile clubs continue to grow in popularity. All these activities require the participant to wear a helmet that is certified by the Snell Memorial Foundation, a not-for-profit organization dedicated to research, education, testing, and development of helmet safety standards. Snell “SA” (Sports Application)-rated professional helmets are designed for auto racing and provide extreme impact resistance and high fire protection. One of the key factors in selecting a helmet is weight, since lower weight helmets tend to place less stress on the neck. Consider the following data showing the weight and price for 18 SA helmets.
| Weight (oz) | Price ($) |
| 64 | 248 |
| 64 | 278 |
| 64 | 200 |
| 64 | 200 |
| 58 | 300 |
| 47 | 700 |
| 49 | 900 |
| 59 | 340 |
| 66 | 199 |
| 58 | 299 |
| 58 | 299 |
| 52 | 479 |
| 52 | 479 |
| 63 | 369 |
| 62 | 369 |
| 54 | 559 |
| 63 | 250 |
| 63 | 280 |
- a. Develop a
scatter diagram with weight as the independent variable. - b. Does there appear to be any relationship between these two variables?
- c. Develop the estimated regression equation that could be used to predict the price given the weight.
- d. Test for the significance of the relationship at the .05 level of significance.
- e. Did the estimated regression equation provide a good fit? Explain.
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Automobile racing, high-performance driving schools, and driver education programs run by automobile clubs continue to grow in popularity. All these activities require the participant to wear a helmet that is certified by the Snell Memorial Foundation, a not-for-profit organization dedicated to research, education, testing, and development of helmet safety standards. Snell "SA" (Sports Application)-rated professional helmets are designed for auto racing and provide extreme impact resistance and high fire protection. One of the key factors in selecting a helmet is weight, since lower weight helmets tend to place less stress on the neck. The data in the Excel Online file below show the weight and price for 18 SA helmets. Construct a spreadsheet to answer the following questions.
Automobile racing, high-performance driving schools, and driver education programs run by automobile clubs continue to grow in popularity. All these activities require the participant to wear a helmet that is certified by the Snell Memorial Foundation, a not-for-profit organization dedicated to research, education, testing, and development of helmet safety standards. Snell "SA" (Sports Application)-rated professional helmets are designed for auto racing and provide extreme impact resistance and high fire protection. One of the key factors in selecting a helmet is weight, since lower weight helmets tend to place less stress on the neck. Suppose the following data show the weight and price for 18 SA helmets.
Weight (oz)
Price ($)
64
248
64
278
64
200
64
200
58
300
47
700
49
900
59
340
66
189
58
299
58
299
52
479
52
479
63
369
62
369
54
569
63
250
63
280
Develop the estimated regression equation that could be used to predict the price ($)…
Chapter 14 Solutions
CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
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