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Unformatted text preview: inches? Circle the correct answer but also show your work. a. .1331 b. .1738 c. .2662 d. .4131 e. .7338 f. .8262 * 1 4. At a street intersection in Norman, 4% of all drivers run a red light. From the very large number of drivers on a given day, 350 drivers are selected at random. What is the approximate probability that between seven and eleven of the drivers will run the red light? Circle the correct answer but also show your work. a. .0936 b. .1028 c. .1780 * d. .5874 e. .1.09 f. between .09 and .64 5. The life of computer speakers is assumed to be normally distributed with a mean of 18 years and a variance of 29.7025 years 2 . If 40 speakers are selected at random, what is the probability that the sample mean speaker lifetime will be greater than 20 years? .0102 2...
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This note was uploaded on 04/07/2008 for the course ECON 2843 taught by Professor Hudgins during the Spring '08 term at The University of Oklahoma.
 Spring '08
 HUDGINS

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