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.
Answer Wiki. Variance is a measure of the dispersion of data. It tells us to what extent the data is dispersed around a certain âtrueâ or âaccurateâ value(central tendency - one measure of which is the mean of the data.). The term variance is used in univariate analysis where we are looking at the behaviour of one variable alone.