PracticeQuestions4Answers

PracticeQuestions4Answers - Practice Questions 4 Answers 1....

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Practice Questions 4 Answers 1. a. C b .B c. D d. A 2. a. C b. D c. B 3. a. B b. C 4. a. A b. D 5. a. D b. C 6. a. B b. A 7. a. D b. B c. C d. B e. A f. D g. A h. B i. C 8. a. D b. A 9. a. C b. A 10. B 11. B 12. D 13. A 14. C 15. D 16. A 17. C 18. B 19. a. P ( X > 8) = (20-8) / (20-0) = 12 / 20 = 0.60 b. P (10 < X < 15) = (15-10) / (20-0) = 5 / 20 = 0.25 c. The range is a total of 20 minutes. Seventy percent of the time, you should be called in before you wait 14 minutes. 20. a. 0.3859 b. 0.8907 c. 0.6985 d. 0.5549 21. a. k = -0.95 b. k = 0.18 c. k = 1.04 d. k = 1.33 22. P = 0.24, n = 50, = E ( X ) = nP = 12, 2 = Var( X ) = nP (1-P) = 9.12, = 3.02 Without continuity correction P ( X >10) = P ( Z >-0.66) = 0.7454. 23. a. E ( T ) =1/ =15.2, then, = 0.0658, and P ( T > 45) = 45 2.961 e e -- = = 0.0518 b. P ( T < t ) = 0.90, 1- t e - = 0.90 > 0.0658 t e- = 0.10 >-0.0658 t =-2.3026 > t ; 35 minutes 24. a. 18 to 30 minutes represent 80% of the distance between 15 and 30 minutes. Hence, 18 to 30 minutes represent 80% of the distance between 15 and 30 minutes....
View Full Document

This homework help was uploaded on 04/08/2008 for the course ECON 329 taught by Professor Yilmaz during the Spring '08 term at University of Texas at Austin.

Page1 / 3

PracticeQuestions4Answers - Practice Questions 4 Answers 1....

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online