Andrew Boutros - Franklin Township Public Schools

The standard deviation controls the spread of the curve. The bigger the St Dev, the wider the curve. There are roughly 6 widths of standard deviation in a normal curve, 3 on one side of center and 3 on the other side. all have the same overall shape described by mean (μ) and standard deviation (σ). Empirical Rule (68/95/99.7 Rule) ................
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