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ps1_answer - 2 = 9 inches Variance = 9 384.4 472 9 10 62...

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1 Econ 41 Statistics for Economists Summer 2007 Chunming Yuan Problem Set 1 (Answers) Multiple Choice Summary Table Item Answer Item Answer 1. c 18. b 2. a 19. d 3. a 20. c 4. b 21. c 5. d 22. d 6. b 23. b 7. b 24. c 8. d 25. b 9. c 10. c 11. d 12. b 13. b 14. b 15. b 16. a 17. d Problem and Essay Solutions 1. a. and b. Classes f Relative Frequency Percentage 21 to 30 3 .100 10.0 31 to 40 5 .167 16.7 41 to 50 8 .267 26.7 51 to 60 5 .167 16.7 61 to 70 5 .167 16.7 71 to 80 4 .133 13.3 c. 30.0% d. 26.7% e.
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