What is the meaning of Samona? How popular is the baby name Samona? Learn the origin and popularity plus how to pronounce Samona
Variance. Variance (Ï 2) is a measure of the dispersion of a set of data points around their mean value. In other words, variance is a mathematical expectation of the average squared deviations from the mean. It is computed by finding the probability-weighted average of squared deviations from the expected value. Variance measures the variability from an average (volatility).
A sum of squares, in most statistical contexts, is the sum of the squares of the differences (or deviations) between individual values and the mean of the values. So if our values are 2 and 4, the mean is 3. 2 â 3 is -1, and the squared deviation is +1. 4 â 3 is 1, and the squared deviation is +1.