StandardDeviation.md (360B)
1 # Standard Deviation 2 3 Stats D2 4 5 **Definition:** This is the average difference between each value in a dataset and the mean of the dataset. 6 7 See also [Variance](Variance.md) which is the squared value. As such, to find the standard deviation of some random variable X we can do the following: 8 9 std.dev = sqrt(var(X)) 10 11 Where var$(X) = \sum_x(x-E[X])^2p_X(x)$