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. S= n [Σ(f•x?)] - [Σ«•x)]2 n(n-1) Interval Frequency Standard deviation = 30-36 2 37-43 2 44-50 7 …… 51-57 4 (Round to one decimal place as needed.) 58-64 8 65-71 31 72-78 29 n

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