ambermanning01 ambermanning01

24-02-2024
Mathematics

contestada

Suppose that the speed at which cars go on the freeway is normally distributed with mean 68 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible.
c. If one of the cars is randomly chosen, find the probability that it is traveling between 67 and 71 mph.
d. 74% of all cars travel at least how fast on the freeway?

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