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Exam 2 - Old Exam 06

# Exam 2 - Old Exam 06 - Test 2 Statistics 211-509(Fall 2006...

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Test 2 - Statistics 211-509 (Fall 2006) Name: Student ID: This test consists of 5 numbered pages. Make sure you have all 8 pages. It is your responsibility to inform me if a page is missing!!! You have 50 minutes to complete this test. You may use the provided crib sheets, all appropriate tables and a calculator. If I provide partial results—assume they are correct and use them even if they are not. If there is no correct answer or if multiple answers are correct, select the best answer. There is no penalty to wrong answers. . . so guess if you do not know an answer. It is your responsibility to look at the overhead or blackboard about every 15 minutes and to incorporate any relevant information into your test. 1

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Chapter 4 1. The time headway in traﬃc ﬂow is the time between two randomly selected consecutive cars (sec). Suppose the density function of time headway is f ( x ) = ( 4 x - 5 if x > 1 0 otherwise , and the distribution function is F ( x ) = 1 - x - 4 , for x > 1. The 99 th percentile for this distribution. (a) 10 1 / 4 (b) 10 (c) (4 / 0 . 99) 1 / 5 (d) (4 / 0 . 01) 1 / 4 Suppose the force acting on a column that helps to support a building is normally distributed with mean 15.6 kips and standard deviation 1.6 kips. Answer the following two questions.
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Exam 2 - Old Exam 06 - Test 2 Statistics 211-509(Fall 2006...

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