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PAM2100_Prelim_2

# PAM2100_Prelim_2 - PAM 2100 Prelim#2 NAME TA Section 1 2 3...

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PAM 2100 – Prelim #2 NAME: ________________________ TA:________________________ Section:__________ 1. A or C (2) 2. C (2) 3. B (2) 4. A (2) 5. D (2) 6. B (2) 7. C (2) 8. C (2) 9. D (2) 10. a. μ =2.55 σ =1.236 (3) b. 0.47 (2) 11. a. 13 (2) b. 12.5 (3) 12. a. 11.9% (2) b.4.67% (3) 13. a. 99.01% (4) b. Increase the sample size (1) 14. a. ܪ : ߤ ൒ 1 ܪ : ߤ ൏ 1 (2) b. 0.0392________________________ (2) c. Fail to reject the hypothesis that ߤ ൒ 1 at the 1% significance level __________ (2) 15. a. ܪ : ߤ ൌ 1850 ܪ : ߤ ് 1850 (2) b. t * =2.00; t crit =1.69 (2) c. Since ݐ כ ൐ ݐ ௖௥௜௧ we reject the hypothesis that ߤ ൌ 1850 at the 10% significance level. (2) 16. a. 0.6 േ 0.096 (2) b. 142 (2) 17. Room is given in the exam to answer this question. (2) BONUS: 50% (2)

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INSTRUCTIONS: Complete all questions. You must write your answer on the front page of the exam. You must also write your name and section number. The first ten questions are multiple choice, and are worth 2 point each. The point for the following 1. For a uniform probability density function of x, a. the height of the function cannot be larger than one. b. the height of the function is the same for all values of x. c. the height of the function is different for various values of x. d. the height of the function decreases as x increases. 2. Which of the following statements about a discrete random variable and its probability distribution must be true? 3. Whenever p=0.40, the binomial distribution will be 4. Suppose we draw several different samples of a size n from a large population. Each time we draw a sample, we determine a 95% confidence interval for the population mean. Which of the following statements is true?

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PAM2100_Prelim_2 - PAM 2100 Prelim#2 NAME TA Section 1 2 3...

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