Comm291_Final_Exam_2003

Comm291_Final_Exam_2003 - The University of British...

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The University of British Columbia Faculty of Commerce and Business Administration Commerce 291 Final Examination, April 2003 Name: ____________________________ Student Number: ________________ (Underline your last name) Section Number/Instructor (Check one) ___201 TR 8:30-10:30 Ellen Fowler ___205 MW 8:30-10:30 Xuan Zhao ___202 TR 11:00-1:00 Ellen Fowler ___206 WF 11-1:00 Jonathan Berkowitz ___203 MW 1:30-3:30 Shuya Yin ___207 WF 1:30-3:30 Alan Donald ___204 MW 4:00-6:00 Jose Rodriguez ___208 WF 3:30-5:30 Alan Donald Instructions -- Read carefully. Do not start this exam until you have entered your name, student number and section number at the top of this page. Put your student card on the desk ready for identification. This exam consists of 9 questions . Check that you have 12 pages , including this page. Check to ensure that your copy is complete. You have 3 hours to do this exam. This is an "open book and notes" exam. After you are told that the exam is over, you have 5 minutes to get your exam booklet to the indicated places as you exit the exam room. Write your answers on the actual copy of this exam in the indicated spaces . Hand in only this exam. Nothing else will be marked. You may use scratch paper to do rough calculations but do not hand in the scratch paper. Answer ALL questions. Question Maximum Your Mark 1 20 2 8 3 8 4 16 5 10 6 8 7 10 8 12 9 8 Total 100 1
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Question 1 (Total 20 marks) - Multiple Choice a) There are 25 non-identical numbers on a list. The average is 20. One number, which happens to equal 20, is removed from the list. The average of the remaining 24 numbers is: __A. less than 20 __B. equal to 20 __C. more than 20 __D. depends on the SD __E. cannot tell without knowing all the numbers. b) A soft-drink machine can be regulated so that it discharges an average of μ ounces per cup. If the ounces of fill are normally distributed with a standard deviation of 0.4 oz. what value should μ be set at so that 6-oz. cups will overflow only 2% of the time? __A. 6.82 __B. 6.00 __C. 5.18 __D. 5.60 __E. None of these c) A simple random sample of 50 undergraduates at University A found that 60% of those sampled felt that drinking was a problem among university students. A simple random sample of 50 undergraduates at University B found that 70% felt that drinking was a problem among university students. The number of undergraduates at University A is about 2000 while the number at University B is approximately 40,000. We conclude that: __A. the sample from Univ. A has much less sampling variability than that from Univ. B. __B. the sample from Univ. A has much more sampling variability than that from Univ. B. __C. the sample from Univ. A has almost the same
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Comm291_Final_Exam_2003 - The University of British...

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