Variance is a measure of variableness that can be alienated into parts. Many groups of scores have some quantity of variability. Specifically, at least some of the scores vary (show a discrepancy) from one another. Variability is determined by indicating the measure of this dispersion amongst the scores (Huck, 2012). To demonstrate the variability of a set of scores, in statistical data, researchers make use of "variance" or "standard deviation". The variation in a single score is defined as its distance from the mean position. Variance is represented by ( 2.