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.
The Standard Deviation. The standard deviation is the most common measure of variability, measuring the spread of the data set and. the relationship of the mean to the rest of the data. If the data points are close to the mean, indicating that. the responses are fairly uniform, then the standard deviation will be small.