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,...

Can you assist me in answering this? I don't know where to begin.

(this is not graded but, rather, an excersice conducive to acquisition).

Extracted text: 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(f•x²)]- [E«•x)]* n(n - 1) Interval 20-26 27-33 34-40 41-47 48-54 55-61 62-68 Frequency 8 3 32 33 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, 11.1? O A. The computed value is significantly greater than the given value. B. The computed value is significantly less than the given value. C. The computed value is not significantly different from the given value.