ps3_answer

ps3_answer - (iii P x< 12 = 1 –.11.04.03 =.82(iv P(9...

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1 Econ 41 Statistics for Economists Summer 2007 Chunming Yuan Problem Set 3 (Answers) Multiple Choice Summary Table Item Answer Item Answer 1. b 18. a 2. b 19. b 3. b 20. d 4. c 21. b 5. d 6. b 7. a 8. b 9. c 10. b 11. b 12. b 13. c 14. b 15. c 16. c 17. d Problem and Essay Solutions 1. a. Probability Histogram 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 8 9 10 11 12 13 14 x P( x ) b. (i) P( x = 10) = .28 (ii) P( x > 11) = .11 + .04 + .03 = .18
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Unformatted text preview: (iii) P( x < 12) = 1 – (.11 + .04 + .03) = .82 (iv) P(9 ≤ x ≤ 12) = .17 + .28 + .33 + .11 = .89 2 2. Mean = 5.90, Standard deviation = 1.432 3. P(1) = 1 10 1 94 . 06 . )! 1 10 ( ! 1 ! 10 − − = .3438 4. .8059 5. P( k ≥ 6; 2.1) = .0146 + .0044 + .0011 + .0003 + .0001 = .0205...
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This note was uploaded on 10/02/2008 for the course ECON ECON 41 taught by Professor Yuan during the Summer '07 term at UCLA.

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ps3_answer - (iii P x< 12 = 1 –.11.04.03 =.82(iv P(9...

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