The shortest distance between the center of the target and the point where a projectile hits or bursts.... read full article

a deviation score that has been converted to its absolute value

In statistics, the absolute deviation of an element of a data set is the absolute difference between that element and a given point. Typically the point from which the deviation is measured is the value of either the or the mean of the data set.

Difference between the actual amount and the forecasted amount is always expressed as a positive number.