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.
(December 2009). In budgeting (or management accounting in general), a variance is the difference between a budgeted, planned or standard cost and the actual amount incurred/sold.he concept of variance is intrinsically connected with planned and actual results and effects of the difference between those two on the performance of the entity or company.