StatisticMIDEXAM10_2006 - MIDTERM EXAM Subject: Business...

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MIDTERM EXAM Subject: Business Statistics Time: 90min This is an open book exam. (Laptops are prohibited). Lecturer: Nguyen Minh Tuan Part 1: Select the most appropriate answers ( 2 marks/each ) 1. Consider the data set: 27, 24, 20, 15, 30, 34, 28, 25. The 25 th percentile is a. 20 b. 23 c. 25 d. 27 2. A value is identified as an outlier by using box plot. Then in using z -score method, this value will also be identified as an outlier. a. True. b. False. 3. Which of the following pairs of events are mutually exclusive? a. A: the odd numbers B: the number 7 b. A: the even numbers B: the number greater than 20 c. A: The numbers above 100 B: the numbers less than -50 d. A: Negative number B: the even number 4. Which of the following is not a possible probability a. 1 b. 0 c. 1.35 d. 15/20 5. The probability that yesterday is a rainy day is a. 1 b. 0 c. 1 or 0 d. Between 0 and 1 6. There are 10 marbles in which there are 5 red ones. Select 3 marbles at random. What is the probability of having 2 red marbles selected? a. 4/15 b. 5/12 c. 6/17 d. 3/14
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7. Among 25 articles, nine are defective, six having only minor defects and three having major defects. Detemine the probability that an article selected at random has major
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This note was uploaded on 11/13/2010 for the course BUSINESS A BA12345 taught by Professor Harry during the Spring '10 term at University of Economics and Technology.

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StatisticMIDEXAM10_2006 - MIDTERM EXAM Subject: Business...

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