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Unformatted text preview: taken in order to estimate the mean expenditure for the whole student population. What is the probability that the sample mean differs from the population mean by more than $8? Circle the correct answer but also show your work. a. Approximately 0 b. .0322 c. .0644 * d. .9356 e. .9678 f. 1.1428 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 ten and twenty of the drivers will run the red light? Circle the correct answer but also show your work. a. .0936 b. .1884 c. .3621 d. .8116 * e. .9495 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 standard deviation of 3.45 years. What is the probability that a speaker will last less than 12 years? .0409 2...
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 Spring '08
 HUDGINS

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