Standard Deviation
Standard Deviation. Consider the following sets of data: 3,9,12,15,19,20. 0. 20. Range = 20-3 = 17 Mean = (3+9+12+15+19+20)/6=13. 0. 20. 0. 20. 11,12,13,13,14,15. 0. 20. Range = 15-11 = 4 Mean = (11+12+13+13+14+15)/6 = 13.
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