Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below, where x represents the class midpoint, f represents the class frequency, and n represents the total number of sample values. Also, compare the computed standard deviation to the standard deviation obtained from the original list of data values, 11.1. [ E (t . x2) ] - [ E (f . x)]2 S = n(n - 1) Interval 30-36 37-43 44-50 51-57 58-64 65-71 72-78 Frequency 2 1 9 4 10 33 36 Standard deviation = (Round to one decimal place as needed.)