FE-OLD-202

FE-OLD-202 - Stat 202 Winter 2009 Junk Page Page 1 of 22...

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Stat 202 Winter 2009 Part 1 - [29 Marks/1 Mark each] Multiple Choice: Each question is worth 1 mark. There is no penalty for guessing. best correct answer into the scantron provided. 1. Pr ( E 1 j E 2 ) = 0 : 5 and Pr ( E 1 j not E 2 ) = Pr E 1 j E C 2 ± = 0 : 5 : Events E 1 and E 2 are: (a) not disjoint and independent (b) not disjoint and not independent (c) disjoint and independent (d) disjoint and not independent 2. Two people are picked at random from a small population without replacement. E 1 person chosen has brown eyes. E 2 is the event that the second person has brown eyes. Events E 1 and E 2 are: (a) not disjoint and independent (b) not disjoint and not independent (c) disjoint and independent (d) disjoint and not independent 3. The Central Limit Theorem is important in statistics because (a) for a large n, it says the population is approximately normal. (b) for any population, it says the sampling distribution of the sample mean is approximately normal, regard- less of the shape of the population (c) for a large n, it says the sampling distribution of the sample mean is approximately normal, regardless of the shape of the population (d) for any sample size, it says the sampling distribution of the sample mean is approximately normal 4. As its name suggests, the objective of estimation is to determine the approximate value of: (a) a population parameter on the basis of a sample statistic (b) a sample statistic on the basis of a population parameter (c) the sample mean (d) the sample variance 5. Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of 8 private colleges in the United States revealed the following endowments (in millions of dollars): 79 : 225 ; 66 : 025 ; 254 : 125 ; 509 : 025 ; 141 : 625 ; 196 : 525 ; 114 : 425 ; and 239 : 025 . What value will be used as the point estimate for the mean endowment of all private colleges in the United States? (a) $1466.0 (b) $200.0 (c) $162.0 (d) $27.0 Page 2 of 22
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Stat 202 Winter 2009 (b) sample size decreases (c) value of the population standard deviation increases (d) All of the above 7. A 98% 75 : 38 to 86 : 52 level is reduced to 90% (a) becomes wider (b) remains the same (c) becomes narrower (d) None of the above.
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FE-OLD-202 - Stat 202 Winter 2009 Junk Page Page 1 of 22...

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