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.
Overhead Controllable Variance: Definition and Explanation: The controllable variance is the difference between actual expenses incurred and the budget allowance based on standard hours allowed for work performed. This variance may be favorable or unfavorable. If the actual factory overhead is more than the budget allowance based on standard hours allowed for work performed, the variance is called unfavorable controllable variance.