Dispersion

In statistics, dispersion (also called variability, scatter, or spread) is the extent to which a distribution is stretched or squeezed. Common examples of measures of statistical dispersion are the variance or the standard deviation.

Measures
A measure of statistical dispersion is a nonnegative real number that is zero if all the data are the same and increases as the data become more diverse.

Most measures of dispersion have the same units as the quantity being measured. In other words, if the measurements are in Pro Kit cards, so is the measure of dispersion. Examples of dispersion measures include the standard deviation and the min–max range displayed on the Card distribution per box tab in infoboxes of Pro Kit Box pages.

Another measure of dispersion is the Variance (the square of the standard deviation). The units of the variance for Pro Kit Boxes would be "cards²" which is less intuitive to understand.