Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 47.4 miles per hour. Speed (miles per hour) 42-45 46-49 50-53 54-57 58-61 Frequency 24 15 7 4 2 The mean of the frequency distribution is (Round to the nearest tenth as needed.) miles per hour. Use software or a calculator to find the range, variance, and standard deviation of the following body temperatures, in degrees Fahrenheit, taken at 12:00 A.M. Click the icon to view the table of body temperatures. The range of the data set is (Round to two decimal places as needed.)