Anxiety can often make these related conditions worse, so talk with a mental health care professional if anxiety begins to interfere on a daily basis.
In probability theory and statistics, the variance of a random variable is a measure of its statistical dispersion, indicating how far from the expected value its values typically are. The variance of a real-valued random variable is its second central moment, and it also happens to be its second cumulant.
Variance The variance is computed as follows:The variance is the average of the squareddifferences between each data value and the mean.for asamplefor apopulation s 2 m2 =â(x â)N (x i sxi xn 22 1=â ââ 2 () â¢ L.O. 1.2. â¢Rangeâ¢IQRâ¢Varianceâ¢St. Deviationâ¢Coefficient of variation.