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.
Definition. Cost variance is a way of showing the financial performance of a project. Specifically, it is the mathematical difference between budgeted cost of work performed, or BCWP, and the actual cost of work performed, or ACWP.