Standard Deviationσ=1n−1∑i=1n(xi−xˉ)2\sigma = \sqrt{\frac{1}{n-1} \sum_{i=1}^{n} (x_i - \bar{x})^2}σ=n−11i=1∑n(xi−xˉ)2σ = Standard Deviation n = Sample Size xix_ixi = Individual data point xˉ\bar{x}xˉ = Mean