Question: Traffic studies have shown that the best speed limit to post on a given road is the 85th percentile speed. Assume a road engineer collects

Traffic studies have shown that the best speed limit to post on a given road is the 85th percentile speed.
Assume a road engineer collects these data to determine the speed limit on a local street.
a. Draw a histogram for these data.
b. Find the 85th percentile speed.
c. What speed limit would you recommend based on this traffic study?
d. What other factors should be considered in determining a speed limit?

Speed (mi/h) 13-15 16-18 19-21 22-24 25-27 28-30 Number of Cars SpeedNumber of Cars (mi/h) 31-33 34-36 37-39 40-42 43-45 46-48 (frequency) (frequency) 17 13 15 21

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a b Between 37 mih and 39 mih Because 100 cars were surveyed the 8... View full answer

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