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).
This is equal to one minus the square root of 1-minus-R-squared. For example, if the modelâs R-squared is 90%, the variance of its errors is 90% less than the variance of the dependent variable and the standard deviation of its errors is 68% less than the standard deviation of the dependent variable.