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 Theory. Variance Theory within the Process Theory compares an employee's motivation to his behaviors and needs. An employee feels more motivated when he believes that the rewards of achieving a goal will materialize, will meet his needs and will match the energy he put into accomplishing tasks.