ByteHouse Enterprise Edition
Calculate Σ((x - x̅)^2) / (n - 1), here n is the sample size, x̅ is the average value of x.
It represents the unbiased estimate of the variance of a random variable if the values passed form its sample.
Back Float64. When n <= 1, back +∞.
warning
This function uses a numerically unstable algorithm. If you need numerical value stability in Calculating, use the varSampStable function. It works slower, but provides lower calculation errors.