When the mean value is close to zero, the coefficient of variation will approach infinity and is therefore sensitive to small changes in the mean.In contrast, the actual value of the CV is independent of the unit in which the measurement has been taken, so it is a dimensionless number.įor comparison between data sets with different units or widely different means, one should use the coefficient of variation instead of the standard deviation. The coefficient of variation is useful because the standard deviation of data must always be understood in the context of the mean of the data. The coefficient of variation (CV) is defined as the ratio of the standard deviation σ or GCV by inverting the corresponding formula.Ĭomparison to standard deviation Advantages 6.3 As a measure of standardisation of archaeological artefacts.6.2 As a measure of economic inequality. ![]() 6.1 Laboratory measures of intra-assay and inter-assay CVs.
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