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.x ) ] - [E(-x)] n(n = 1) Interval 30-39 40-49 50-59 60-69 70-79 80-89 90-99 Frequency 2 3 29 37 Standard deviation = (Round to one decimal place as needed.)