Panic attack symptoms are a common reaction. Other anxiety disorders include: agoraphobia, separation anxiety disorder and substance/medication-induced anxiety disorder involving intoxication or withdrawal or medication treatment.
Statistics and Probability Dictionary. Select a term from the dropdown text box. The online statistics glossary will display a definition, plus links to other related web pages. Select term: Variance. The variance is a numerical value used to indicate how widely individuals in a group vary. If individual observations vary greatly from the group mean, the variance is big; and vice versa. It is important to distinguish between the variance of a population and the variance of a sample.
Variance The variance is computed as follows:The variance is the average of the squareddifferences between each data value and the mean.for asamplefor apopulation s 2 m2 =â(x â)N (x i sxi xn 22 1=â ââ 2 () â¢ L.O. 1.2. â¢Rangeâ¢IQRâ¢Varianceâ¢St. Deviationâ¢Coefficient of variation.