Interstate Speeds It has been reported that the standard
Chapter 8, Problem 12(choose chapter or problem)
Interstate Speeds It has been reported that the standard deviation of the speeds of drivers on Interstate 75 near Findlay, Ohio, is 8 miles per hour for all vehicles. A driver feels from experience that this is very low. A survey is conducted, and for 50 drivers the standard deviation is 10.5 miles per hour. At a _ 0.05, is the driver correct?
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