A popular band on tour played a series of concerts in large venues. They always drew a large crowd, averaging 21,359 fans. While the band did not announce (and probably never calculated) the standard deviation, which of these values is most likely to be correct: 20, 200, 2000, or 20,000 fans? Why? (Hint: Consider the 68 - 95 - 99.7 (empirical) rule)