M147finalaf03

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Unformatted text preview: Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Total 20 Pts 23 Pts 12 Pts 12 Pts 15 Pts 21 Pts 30 Pts 12 Pts 16 Pts 15 Pts 176 Pts MATH 147 FINAL EXAM Fall 2003 Dec 19, 2003 Name: Section: DIRECTIONS: Show all work. Solutions with no work will receive NO credit. Neatness counts. All necessary tables are provided at the end of the test. Carry out all your calculations to at least two digits to the right of the decimal point. Part I True/False For questions 1 - 11 circle T for true and F for false. (2 points each) 1. T F According to data from the National Highway and Traffic Safety Administration, 134 Corvettes were stolen out of 18,938 produced while 300 Berettas were stolen out of 47,598 pro- duced. Since 300 is bigger than 134, it is reasonable to conclude that car thieves prefer Berettas. 2. T F If the graph of averages happens to be a straight line, then it coincides with the regression line. 3. T F If a fair coin is flipped 5 times and shows a heads each time, the law of averages states that the 6th flip is more likely to be a tails. 4. T F Correlation measures association. But association does not necessarily show causation. It may only show that both variables are simultaneously influenced by some third variable. 5. T F A correlation coefficient of- 1 shows a weak correlation. 6. T F If the chance of A is .6 and the chance of B is also .6, then A and B are mutually exclusive. 7. T F If two events are independent, the chance that both will happen equals the product of chances of the separate events. 8. T F When performing a test of significance, the test statistic always follows a normal distri- bution. 9. T F When performing a test of significance, the P-value of a test gives the chance that the null hypothesis is true. 10. T F When sampling from a population, the method of choosing a sample matters a lot regardless of the sample size. 1 11. T F The NFIP study of the Salk polio vaccine was an example of a randomized controlled experiment. Part II Fill in the blank For questions 12 - 18 complete the sentence by filling in the blank. (2 points for each blank) 12. Suppose that in a certain class, there are 70% men and 30% women; 20% freshmen and 80% sophomores. The percentage of sophomore women in the class can be as low as . 13. A fair die will be rolled some number of times, and you win \$1 if it shows an ace less than 12% of the time. Which is better: 60 rolls or 600 rolls? (circle one.) 14. A university has 25,000 students, of whom 13,000 are undergraduates. The housing office takes a simple random sample of 400 students; 196 out of the 400 are undergraduates. For the number of undergraduates in the sample, the observed value is , but the expected value is and the chance error is ....
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## This note was uploaded on 05/27/2008 for the course MATH 147 taught by Professor Klimko during the Fall '07 term at Binghamton University.

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