Assignment:
Calculate the standard deviation.
2.31, 2.79, 3.33, 4.21, 4.22, 4.75, 5.51, 6.26, 11.57, 18.90, 20.25, 25.78, 36.88, 44.96, 77.82, 80.80, 105.80, 151.95
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