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final_s02sol

# final_s02sol - vs H_1 mu not equal 21.0...

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Solutions to ST 370 Final Exam, Spring 2002 1. binomial 2. the point such that 67 percent of the data lies below it 3. All of the above (standard deviation,sample range,interquartile range) 4. .9251 5. 1.358 6. (ii) a small population mean difference and large sample sizes. 7. Only when $A$ and $B$ are mutually exclusive events. 8. Only when $A$ and $B$ are statistically independent events. 9. 35 (xbar +- 1 ==> length 2) 10. a 95\% confidence interval for $\pi$ is always wider than a 90\% (since 1.96 > 1.645) 11. 0.7492 12. \$128 (12*2.33+100) 13. H_0: mu = 21.0
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Unformatted text preview: vs. H_1: mu not equal 21.0 14. (xbar-21.0)/[s/sqrt{n}] 15. (21.48,23.40) (must use t since s is used) 16. 2 (since 1=integral c(1-x)=c/2 ==> c=2) 17. to decide between hypotheses about population means. 18. Y = 4.51 - 0.57x 19. 0.85 (R-square) 20. liquid and temperature 21. time 22. All of the above. 23. Z=(.18 - .10)/sqrt{(.10)(.90)/100} 24. Z > 2.33 25. (0.09,0.27) 26. None of the above. 27. 0.2642 28. 0.60 29. (160, 240) 30. All of the above. (Pr(X=2)=0 since area under one point=0.) 31. (ii) 32. 6.67 33. t < -1.638...
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