<P> 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 . </P> <P> Most measures of dispersion have the same units as the quantity being measured . In other words, if the measurements are in metres or seconds, so is the measure of dispersion . Examples of dispersion measures include: </P> <Ul> <Li> Standard deviation </Li> <Li> Interquartile range (IQR) </Li> <Li> Range </Li> <Li> Mean absolute difference (also known as Gini mean absolute difference) </Li> <Li> Median absolute deviation (MAD) </Li> <Li> Average absolute deviation (or simply called average deviation) </Li> <Li> Distance standard deviation </Li> </Ul> <Li> Interquartile range (IQR) </Li>

Measures of indicate how scores are spread out in a distribution