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Quiz 3 Sp 06 KEY

# Quiz 3 Sp 06 KEY - a.0225 b.2144 c.7734 d.7856 e.9800...

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ECON 2843 Name KEY Quiz 3 Spring 2006 ID # Students must show all work on problems that involve calculation. Questions 1 through 3 refer to the following. Tompkins Associates reports that the mean clear height for a Class A warehouse in the U.S. is 22 feet. Suppose clear heights are normally distributed and that the variance is 16 feet. A Class A warehouse in the U.S. is randomly selected. 1. What is the probability that the clear height is greater than 17 feet? Circle the correct answer but also show your work. a. .1056 b. .3125 c. .3873 d. .5000 e. .6127 f. .8944 * 2. What is the probability that the clear height is less than 13 feet? Circle the correct answer but also show your work. a. .0122 * b. .2877 c. .5625 d. .7123 e. .9878 f. approximately 1 3. What is the probability that the clear height is between 25 and 31 feet? Circle the correct answer but also show your work.

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Unformatted text preview: a. .0225 b. .2144 * c. .7734 d. .7856 e. .9800 f. .9878 1 4. At a street intersection in Norman, 6% of all drivers run a red light. From the very large number of drivers on a given day, 500 drivers are selected at random. What is the approximate probability that between twenty-eight and thirty-five of the drivers will run the red light? Circle the correct answer but also show your work. .4744 5. A subdivision on the southwest side of Oklahoma City contains 1,500 houses. The subdivision was built in 1983. A sample of 100 houses is selected randomly and evaluated by an appraiser. If the standard deviation of the appraised value of all the houses in this subdivision is \$8,500, what is the probability that the sample mean will exceed the population mean by more than \$1,000? .1112 (using the FPCF) 2...
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Quiz 3 Sp 06 KEY - a.0225 b.2144 c.7734 d.7856 e.9800...

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