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Assignments2 solutions: Due by Midnight Sunday, February 17, 2013 (dropbox of week 2) (Chapters 4, 5, and 6): Total 70 points. Show work True/False (one point each) Chapter 4 1. . Events whose union has the probability equal to 1 are called Exhaustive events. 2. If events A and B are mutually exclusive, then P(A/B) is always equal to zero. 3. If events A and B are independent, then P(A/B) is always equal to zero. Chapter 5 4. If the probability of success is 0.2 and the number of trials in a binomial distribution is 400, then its standard deviation is 8. 5. Document Preview: Assignments2 solutions: Due by Midnight Sunday, February 17, 2013 (dropbox of week 2) (Chapters 4, 5, and 6): Total 70 points. Show work True/False (one point each) Chapter 4 1. . Events whose union has the probability equal to 1 are called Exhaustive events. 2. If events A and B are mutually exclusive, then P(A/B) is always equal to zero. 3. If events A and B are independent, then P(A/B) is always equal to zero. Chapter 5 4. If the probability of success is 0.2 and the number of trials in a binomial distribution is 400, then its standard deviation is 8. 5. If a fair coin is tossed 100 times, then the variance of the random variable defined as the number of heads is exactly five. 6. If a fair coin is tossed 20 times then the probability of exactly 10 Tails is less than 17 percent. Chapter 6 7. The number of defective pencils in a lot of 1000 is an example of a discrete random variable. 8. For a continuous distribution, P(X = 100) is greater than P(X?100). 9. A continuous variable may not be Normally distributed. 10. The mean of a standard normal distribution is not equal to 1. 11. If the sample size is 1000, we can safely use the normal approximation to binomial even for small p. 12. For a binomial probability experiment, if p is 0.1 and n is only 150, we cannot use the normal approximation to the binomial distribution without continuity correction. Multiple Choice (2 points each) Multiple Choice (Chapter 4) 1. Two mutually exclusive events having positive probabilities are ______________ dependent. A. Never B. Always C. Sometimes 2. If P(A)?0 and P(B)?0 and events A and B are independent, then: A. P(A)=P(B) B. P((A|B))=P(A) C. P(AB)=0 D. P(AB)=P(A)/ P(B/A) E. Both A and C are correct Chapter 5 3. In a study conducted by UCLA, it was found that 25% of college freshmen support increased military spending. If 6 college freshmen are randomly selected, find the probability that more than 3 support increased military... Attachments: 578Assignment....doc Feb 07 2013 12:30 AM

 

Solution ID:608840 | This paper was updated on 26-Nov-2015

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