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27 is what percent of 108? 27 is % of 108

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?