1. Jeannie is an experienced business traveler, often traveling back and forth from San Francisco to the East Coast several times per month. To catch her flights from San Francisco she leaves her office one hour before her flight leaves. Her travel time from her office to the departing gate at the San Francisco airport, including the time to park and go through security screening, is normally distributed with a mean of 46 minutes and a standard deviation of 5 minutes. What is the probability that Jeannie will miss her flight because her total time for catching her plane exceeds one hour? Round your final answer to 4 decimal places. Select one: A. 0.0017 B. 0.0026 C. 0.0059 D. 0.0137 E. None of the above 2. Use the same information about Jeannie in the above problem. Jeannie is known to be somewhat lax about getting to the airport in time to catch her flight. Suppose that she decides to leave her office so that she has a 96% chance of catching her flight; consequently there is a 4% chance that she will miss her flight. How many minutes before the flight leaves should she leave her office? Round your final answer to the nearest minute, then input that whole number below. DO NOT include units. Just input the numerical answer or the system will mark your answer wrong even if you input the correct value. Answer: 55 3. In a busy coffee shop, which is a member of an international chain of coffee shops, 40% of customers order a pastry in addition to their drink. If 20 customers were selected at random during one business day, what is the probability that at least 11 of them did not order a pastry with their drink. Round your answer to 4 decimal places. Select one: A. 0.1275 B. 0.3763 C. 0.5956 D. 0.7553 E. None of the above 4. It has been conjectured by the U.S. Census Bureau that "approximately 60% of foreignborn people who live in the U.S. are not naturalized citizens". In a national random sample of 70 foreignborn people who live in the U.S., on average, how many people would you expect to get that are not naturalized citizens. Select the best answer below. Select one: A. 28 people B. 42 people C. 4.10 people D. None of these. 5. A civil service exam yields scores with a mean of 81 and a standard deviation of 5.5. Using Chebyshev's Theorem what can we say about the percentage of scores that are above 92? Select one: A. At most 12.5% of the scores are above 92. B. At most 25% of the scores are above 92. C. At least 75% of the scores are above 92. D. At least 25% of the scores are above 92. E. None of the above 6. A civil service exam yields scores which are normally distributed with a mean of 81 and a standard deviation of 5.5. If the civil service wishes to set a cutoff score on the exam so that 15% of the test takers fail the exam, what should the cutoff score be? Remember to round your zvalue to 2 decimal places. Select one: A. 75.28 B. 86.72 C. 60.24 D. 64.56 E. None of the above 7. Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is 13.4 years with a standard deviation of 1.7 years. Suppose that 40 airplanes were randomly selected from the fleets of these 10 carriers and were inspected for cracks in these airplanes that are considered too large for flying. What is the probability that the average age of these 40 airplanes is at least 14 years old? Round your answer to 4 decimal places. Remember to round your z-value to two decimal places. Select one: A. 0.0129 B. 0.2654 C. 0.3589 D. 0.4731 E. None of the above 8. Out of a total of 10 college textbooks estimate the standard deviation of their ages if the oldest textbook is known to be 7.9 years old and the newest textbook is 1.3 years old. Select one: A. 0.5 years B. 1.1 years C. 2.3 years D. 2.9 years E. 3.3 years 9. In the California Community Colleges an undergraduate student survey was taken that compares the class of the student to their opinion on whether or not they favor or oppose same sex marriages. The following data is a summary of the survey taken by questioning 500 undergraduate students. Freshman 85 61 146 Favor Oppose Totals Sophomore 74 60 134 Junior 64 55 119 Senior 53 48 101 Totals 276 224 500 If a student from the survey is selected at random, then find the probability that the student favors same sex marriages, given that the student is not a Senior? Select one: A. 223500 B. 276399 C. 223399 D. 399500 E. None of the above 10. Assume that the average full time college student in the U.S. requires a total of $10,500 per year to cover the costs of tutition, books and fees with a standard deviation of $1,300. If 50 full time students are randomly sampled in the U.S., what is the probability that their total annual costs for tutition, books and fees exceed $550,000? Round your answer to 4 decimal places. Remember to round your zvalue to 2 decimal places. To answer the question input only the actual number. Do not include units. Do not give your answer in sentence form just include the numerical answer rounded to exactly 4 decimal places. Answer: 0.0033