Measures of dispersion
In statistics, measures of dispersion are a group of mathematical technologies (ie, procedures or formulas) used for describing the spread of values in a dataset or, more often, the spread of values around a measure of central tendency. Measures of dispersion typically refer to the following:
|The total range of values in a distribution||range|
|The spread of values in nominal variables||modal dispersion, variation ratio|
|The spread of values around the median||interquartile range|
|The spread of values around the mean||standard deviation, variance|
Jose D PEREZGONZALEZ (2012). Massey University, Turitea Campus, Private Bag 11-222, Palmerston North 4442, New Zealand. (JDPerezgonzalez).
Want to know more?
- Khan Academy - Range, variance and standard deviation
- Khan teaches about three measures of dispersion on this video.
|Khan Academy (undated - embedded from YouTube on 28 April 2012)|