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Unformatted text preview: Statistics for Business Whitten Spring 2008 Exam 2 Thursday, April 10 100 points EXAM INSTRUCTIONS 1. Bubble Sheet: (a) Write and bubble your Name (last name, first name) (b) Write and bubble your 8-digit Student ID Number (Begin in the leftmost box.) (c) Bubble your Test Form (See below.) 2. Exam Booklet: Write the information below. Name Student ID Number Section Number TA’s Name Discussion Time 3. Exam Locations Location Sections W151 PBB A 2 , A 4 100 PH A 3 , A 6 , A 8 , A 9 , A 10 1505 SC A 5 , A 7 W10 PBB A 11 , A 12 , A 13 , A 14 , A 15 , A 16 , A 19 225 CB A 20 , A 21 , A 22 , SCA, SCB, SCC, SCD 4. You may use a calculator (but no cell phones), pencil, and one 8 1 2 00 × 11 00 sheet of paper, front and back, of handwritten or word-processed notes. 5. There are 45 questions and two tables on 18 pages. Check your exam for these. 6. The exam format is multiple choice. Circle the single best answer on the exam booklet and fill the corresponding bubble on the bubble sheet with a No. 2 pencil. Carefully erase any answers on the bubble sheet which you wish to change. 7. You have two hours to complete the exam. 8. TA’s can clarify exam questions but cannot provide hints for answers. 9. When finished, place the bubble sheet inside the first page of the exam booklet. Deposit bubble sheet and exam booklet together into your Discussion folder. 10. The base score for the exam is 12 points. In addition, 2 points are earned for each question which is answered correctly on the bubble sheet. (Question 45 is worth 2 points extra credit.) Check ICON to see your score and a list of exam questions which were answered incorrectly . 11. You may begin the exam. Test Form: A 1 Questions 1–5. Classify the following random variables as either continuous or discrete . 1. Number of “heads” in six tosses of a nickel. (a) continuous (b) discrete 2. Number of times which a nickel must be tossed until the first “heads” appears. (a) continuous (b) discrete 3. The change given by a movie theater cashier to a customer who pays cash to see the movie, in dollars. (a) continuous (b) discrete 4. Length of time until a car’s fan belt breaks, in months. (a) continuous (b) discrete 5. Number of miles traveled by a salesperson each month. (a) continuous (b) discrete Questions 6–8. Voter registration records show that 68% of all voters in Indianapolis are registered as Repub- licans. To test a random-digit dialing device, you use the device to call 150 randomly-chosen residential telephones in Indianapolis. Of the registered voters contacted, 73% are registered Republicans. One of the two percentages in this problem is a parameter and the other is a statistic . 6. Is 68% a parameter or a statistic?...
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This note was uploaded on 04/20/2008 for the course STAT 025 taught by Professor Whitten during the Spring '08 term at University of Iowa.
- Spring '08