Find the standard deviation, s, of sample data summarized in the frequency distribution table given 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, 9.0. S= |n[Σ(f•x)]-[Σ(t•x] n(n-1) Interval Frequency 20-29 1 30-39 25 40-49 38 50-59 25 O A. The computed value is not significantly different from the given value. O B. The computed value is significantly greater than the given value. OC. The computed value is significantly less than the given value. 60-69 5 70-79 3 Standard deviation = (Round to one decimal place as needed.) Consider a difference of 20% between two values of a standard deviation to be significant. How does this computed value compare with the given standard deviation, 9.0?