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

Interval Frequency 20-29 1 30-39 4 40-49 3 50-59 4 60-69 8 70-79 36 80-89 34