Suppose the following table gives the extra travel time each year, in hours, for peak-period travelers in urban areas with more than 3 million people. Annual Hours of Delay per Traveler Urban Area Los Angeles-Long Beach-Santa Ana, Ca San Francisco-Oakland, CA Atlanta, GA Washington (D.C.-VA-MD) Dallas-Fort Worth-Arlington, TX Houston, TX 67 50 61 66 53 57 Find the mean of the extra travel time each year, in hours, for peak-period travelers in urban areas with more than 3 million people. (Round your answer to two decimal places.) hr What is the standard deviation for these data? (Round your answer to two decimal places.) hr

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