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ioe265f11-Practice+Final-1+_1_

ioe265f11-Practice+Final-1+_1_ - IOE 265 F2011 Practice...

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IOE 265 F2011 Practice Final Exam 1 of 15 Part I. Multiple Choice (10 questions, 4 points each, 40 points total) 1. If P ( A ) = 0.30, P ( B) = 0.10 and events A and B are independent, then P is A. 0.63 B. 0.70 C. 0.90 D. 0.40 2. A random sample of size 100 is drawn from a population with mean of 50 and standard deviation of 8. Let be the sample total (). Then, is equal to: 3. An experiment consists of three parts. There are five ways to accomplish the first part, four ways to accomplish the second part, and three ways to accomplish the third part. The total number of ways to accomplish the experiment is 4. Which of the following statements is not true? 5. If a random variable follows an exponential distribution with (based on a sample of 50 observations), which of the following would represent a large-sample, two-sided 95% confidence interval for (the population mean)? Note: Assume normality based on a large sample size. A. (0.36, 0.64) B. (0.43, 0.57) C. (1.44, 2.55) D. (0.89, 3.11) 6. If P ( A / B ) = P ( A ), and P ( B / A ) = P ( B ) , then events A and B are said to be
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IOE 265 F2011 Practice Final Exam 2 of 15 7. Let be a random sample from a distribution with mean and variance . Then if n is sufficiently large, the mean has approximately a normal distribution with mean and variance. This result is known as the: 8. Which of the following statements are true? 9. Which of the following probability distributions is used to calculate the confidence interval for the variance of a normal population? A. Gamma B. Normal C. Chi-Squared D. None of the above
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