representation. n. 1. the act or an instance of representing or the state of being represented. 2. anything that represents, such as a verbal or pictorial portrait. 3. anything that is represented, such as an image brought clearly to mind.
The standard deviation and range are both measures of the spread of a data set. Each number tells us in its own way how spaced out the data are, as they are both a measure of variation. The range relies on a very simple formula of subtracting the minimum data value from the maximum.
Ann E. Watkins Cal State Northridge September 2014 22. The Standard Deviation. The standard deviation is a third measure of variability. Like the MAD, the standard deviation is based on the. deviations from the mean, but instead of taking the. absolute value of each deviation, each deviation is. squared.