Statement of a problem № m40352


A researcher tests the braking distances of several cars. The braking distance from 60 miles per hour to a complete stop on dry pavement is measured in feet. The braking distances of a sample of cars are normally distributed, with a mean of 129 feet and a standard deviation of 5.18 feet. What is the longest braking distance one of these cars could have and still be in the bottom 1%? a. Sketch a graph. b. Find the z-score that corresponds to the given area. c. Find x using the formula x = μ + zσ. d. Interpret the result.

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