If 5% of all vehicles travel less than 39.17 m/h and 10% travel more than 73.24...

If 5% of all vehicles travel less than 39.17 m/h and 10% travel more than 73.24 m/h, what are the mean and standard deviation of vehicle speed? (Round your answers to three decimal places.)

mean=

standard deviation=

(b)

What is the probability that a randomly selected vehicle's speed is between 50 and 65 m/h? (Round your answer to four decimal places.)

(c)

What is the probability that a randomly selected vehicle's speed exceeds the speed limit of 70 m/h? (Round your answer to four decimal places.)

Expert Solution

orchestra answered 2 years ago

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