What is the standard deviation? Round to one decimal place as needed

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 K 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. n(n - 1) Interval 20-26 27-33 34-40 41-47 48-54 55-61 62-68 Frequency 2 2 12 39 34 Standard deviation = (Round to one decimal place as needed.)