STATS:DATA+MODELS-MY LAB ACC >CUSTOM<
21st Edition
ISBN: 9780137643127
Author: DeVeaux
Publisher: PEARSON
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Chapter 17, Problem 41E
(a)
To determine
Find and interpret the 95% confidence interval for the gas mileage of 2016 vehicles.
(b)
To determine
Explain whether it is possible to generalize that the mean gas mileage for all 2016 lies in the calculated confidence interval.
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In order to find probability, you can use this formula in Microsoft Excel:
The best way to understand and solve these problems is by first drawing a bell curve and marking key points such as x, the mean, and the areas of interest. Once marked on the bell curve, figure out what calculations are needed to find the area of interest.
=NORM.DIST(x, Mean, Standard Dev., TRUE).
When the question mentions “greater than” you may have to subtract your answer from 1.
When the question mentions “between (two values)”, you need to do separate calculation for both values and then subtract their results to get the answer.
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Problem 3:
In New York State, the mean salary for high school teachers in 2022 was 81,410 with a standard deviation of 9,500. Only Alaska’s mean salary was higher. Assume New York’s state salaries follow a normal distribution.
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Chapter 17 Solutions
STATS:DATA+MODELS-MY LAB ACC >CUSTOM<
Ch. 17.2 - Every 10 years, the United States takes a census....Ch. 17.2 - Every 10 years, the United States takes a census....Ch. 17.2 - Prob. 3JCCh. 17.2 - Prob. 4JCCh. 17.2 - Prob. 5JCCh. 17.3 - In discussing estimates based on the long-form...Ch. 17 - Prob. 1ECh. 17 - 2. LSAT The LSAT (a test taken for law school...Ch. 17 - 3. Tips A waiter believes the distribution of his...Ch. 17 - 4. Groceries A grocery store’s receipts show that...
Ch. 17 - 5. More tips The waiter in Exercise 3 usually...Ch. 17 - 6. More groceries Suppose the store in Exercise 4...Ch. 17 - 7. t-models, part I Using the t tables, software,...Ch. 17 - 8. t-models, part II Using the t tables, software,...Ch. 17 - 9. t-models, part III Describe how the shape,...Ch. 17 - 10. t-models, part IV Describe how the critical...Ch. 17 - 11. Home sales The housing market recovered slowly...Ch. 17 - 12. Home sales again In the previous exercise, you...Ch. 17 - 13. Home sales revisited For the confidence...Ch. 17 - 14. Salaries A survey finds that a 95% confidence...Ch. 17 - 15. Cattle Livestock are given a special feed...Ch. 17 - 16. Teachers Software analysis of the salaries of...Ch. 17 - 17. Framingham revisited In Chapter 4, Exercise...Ch. 17 - 18. Student survey revisited Chapter 2, Exercise...Ch. 17 - 19. Shoe sizes revisited Chapter 2, Exercise 16...Ch. 17 - 20. Bird counts A biology class conducts a bird...Ch. 17 - 21. Meal plan After surveying students at...Ch. 17 - 22. Snow Based on meteorological data for the past...Ch. 17 - 23. Pulse rates A medical researcher measured the...Ch. 17 - 24. Crawling Data collected by child development...Ch. 17 - 25. CEO compensation A sample of 20 CEOs from the...Ch. 17 - 26. Credit card charges A credit card company...Ch. 17 - 27. Cholesterol In the latest National Health and...Ch. 17 - 28. Pulse rates In the latest National Health and...Ch. 17 - 29. Normal temperature The researcher described in...Ch. 17 - 30. Parking Hoping to lure more shoppers downtown,...Ch. 17 - 31. Normal temperature, part II Consider again the...Ch. 17 - 32. Parking II Suppose that, for budget planning...Ch. 17 - 33. Speed of light In 1882, Michelson measured the...Ch. 17 - 34. Michelson After his first attempt to determine...Ch. 17 - 35. Flights on time 2016 What are the chances your...Ch. 17 - 36. Flights on time 2016 revisited Will your...Ch. 17 - Prob. 37ECh. 17 - 38. Hot dogs A nutrition lab tested 40 hot dogs to...Ch. 17 - Prob. 39ECh. 17 - Prob. 40ECh. 17 - Prob. 41ECh. 17 - 42. Computer lab fees The technology committee has...Ch. 17 - Prob. 43ECh. 17 - 44. CEO compensation The total compensation of the...Ch. 17 - Prob. 45ECh. 17 - 46. CEOs, revisited In Exercise 44, you looked at...Ch. 17 - Prob. 47ECh. 17 - Prob. 48ECh. 17 - Prob. 49ECh. 17 - 50. Safe cities Allstate Insurance Company...Ch. 17 - Prob. 51ECh. 17 - 52. Rainfall Statistics from Cornell’s Northeast...Ch. 17 - 53. Pregnant again The duration of human...Ch. 17 - 54. At work Some business analysts estimate that...Ch. 17 - Prob. 55ECh. 17 - 56. Doritos Some students checked 6 bags of...Ch. 17 - 57. Popcorn Yvon Hopps ran an experiment to...Ch. 17 - Prob. 58ECh. 17 - Prob. 59ECh. 17 - Prob. 60ECh. 17 - 61. Maze Psychology experiments sometimes involve...Ch. 17 - Prob. 62ECh. 17 - 63. Golf drives 2015 The Professional Golfers...Ch. 17 - Prob. 64E
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