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  • https://stats.libretexts.org/Courses/Las_Positas_College/Math_40%3A_Statistics_and_Probability/03%3A_Data_Description/3.02%3A_Measures_of_Variation/3.2.01%3A_Coefficient_of_Variation
    Summarizing data from a measurement variable requires a number that represents the "middle" of a set of numbers along with a measure of the "spread" of the numbers. You use a statistic of dispersion t...Summarizing data from a measurement variable requires a number that represents the "middle" of a set of numbers along with a measure of the "spread" of the numbers. You use a statistic of dispersion to give a single number that describes how compact or spread out a set of observations is. Although statistics of dispersion are usually not very interesting by themselves, they form the basis of most statistical tests used on measurement variables.

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