Question

There is a construction zone on a highway. The speeds of vehicles passing through this construction zone are normally distributed with a mean of 46 mph and a standard deviation of 4 mph. Suppose that you want to make a speed limit such that only about 10% of the vehicles passing through this zone exceed the speed limit of x mph hour. What should be the speed limit (rounded to the nearest integer)?

Answer 1

The percentage of vehicles passing through this construction zone that are traveling at a speed of 50 and 57 miles per hour