Question: Exercise 4.67 addressed the problem of setting an appropriate speed limit on highways. Automotive experts believe that the correct speed is the 85 th percentile.

Exercise 4.67 addressed the problem of setting an appropriate speed limit on highways. Automotive experts believe that the “correct” speed is the 85^th percentile. Suppose that the speeds on a highway are normally distributed with a mean of 68 and a standard deviation of 5. Find the “correct” speed.

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