Exam1-sum2000 - 1COURSE MSCI 3700 EXAM 1 Name Version B...

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1 COURSE: MSCI 3700 Name: EXAM 1 Version B INSTRUCTOR: Chong Student SS# SEMESTER: Summer II 2000 Student Signature Instructions: n Please put your name, section number, and student number on both this exam cover sheet and your scantron. P You have 1hour and 40 minutes to complete this exam. P The exam is open book (tables in Appendix), open notes, and open mind. Please show all your work on the exam and mark all answers on the scantron. P No cheating. P Good luck! 1
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11. Which of the following can be classified as qualitative data? A. interval B. nominal C. ordinal D. both B&C* E. both A&B 2. What level of measurement is “kind of gasoline purchases” such as reg-unleaded vs super- unleaded vs diesel? Use the following sample values to answer the next four questions 25, 24, -28, 15, 14, -29, 36, 14, 18 3. What is the sample standard deviation? 4. What is the sample mean? 5. What is the mode? A. 18 B. -28 C. 36 D. 14* E. 25 2
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6. What is the sample variance? 7. The 1 st quartile is? Use the following table for the next 3 questions. It shows the frequency distribution of over 1400 steaks ordered over the past 40 days at a local restaurant. For example, on one day 87 steaks were ordered; on another day 93 steaks were ordered; and on a third day 90 steaks were ordered; yielding a frequency of 3 for the fifth class interval. On the other 29 days less than 80 steaks were ordered for each day. Number of Steaks Number of Days that many ordered Relative Frequencies Cumulative Relative Frequencies 0 to 19 7 0.175 0.175 20 to 39 ** **** **** 40 to 59 5 0.125 0.525 60 to 79 8 **** 0.725 80 to 99 ** 0.275 **** Totals 40 **** **** 8. What is the relative frequency for the class interval “20 to 39"?
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9. What is the approximate average (mean) number of steaks ordered per day? A. 45.16 B. 53.00* C. 1400 D. 40 E. 59.51 10. Use the table below to determine the price index for a gallon of regular gasoline for 2000 using 1990 as the base year. Year 1980 1985 1990 1995 2000 Price of a Pack $0.63 $0.58 $1.13 $1.35 $1.75 Price Index is: Use the attached time series decomposition spreadsheet (see pages 11-15) to answer questions #11 through #15. The data shows the number of babies born at a local hospital for each month, 1995 thru 1998.
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