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In: Statistics and Probability

Vehicle speed on a particular bridge in China can be modeled as normally distributed. (a) If...

Vehicle speed on a particular bridge in China can be modeled as normally distributed.

(a) If 5% of all vehicles travel less than 39.19 m/h and 10% travel more than 73.21 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.) You may need to use the appropriate table in the Appendix of Tables to answer this question.

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orchestra answered 1 year ago
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