Standard deviation (symbol σ) is a measure of the dispersion of a set of numerical values. Intuitively, it can be thought of as the mean deviance from the average. It is calculated by taking the square root of variance, or

\sigma = \sqrt{\frac{1}{N} \sum_{i=1}^N (x_i - \mu)^2}, \mu = \frac{1}{N} \sum_{i=1}^N x_i.

where xi is the value of the ith data point in a set and N is the total number of data points.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.