coefficient of variation


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co·ef·fi·cient of var·i·a·tion (CV),

the ratio of the standard deviation to the mean.

coefficient of variation

Lab medicine The standard deviation divided by the mean, expressed as a percentage, used to evaluate and compare methodologies and instruments. See Mean, Standard deviation.

co·ef·fi·cient of var·i·a·tion

(CV) (kō'ĕ-fish'ĕnt var'ē-ā'shŭn)
A unitless number used to describe dispersion of data. It allows comparison of standard deviations of test results expressed in different units. It is calculated from the standard deviation (s) and mean (x). CV = 100s÷x.

coefficient of variation

Analytical variability expressed as the standard deviation's percentage of the mean. This mode of expressing the analytical variability enables one to determine if the variability proportion changes with the actual value. It is typically a useful tool when there is a relatively large dynamic range for the quantity being measured. It is subject to misinterpretation if applied to numbers that have already been mathematically manipulated, such as logarithms.
See also: coefficient
References in periodicals archive ?
Table 1: Disparities in per capita revenue of local governments within and between regions, 1999 Own Plus Plus source assigned regulated Nominal fiscal resources Square coefficient of variation 1.
In the upper-right panel, the coefficient of variation is 4.
However calculation of regional disparities on the basis of the coefficient of variation is insufficient for detailed analysis.
While the coefficient of variation of Alberta's real per capita own-source revenues for the period from 1981 to 2007 is 15.
The mean, standard deviation, variance, and coefficient of variation for the upper and lower part of the township are depicted in Table 4.
However, the coefficient of variation of both per capita transfer and deprivation has decreased over time.
Here, we propose partial correlation criterion to select assets in the portfolio and optimization of coefficient of variation to determine the proportion of asset allocation in EU countries for French and German investors.
Comparison of the observed distribution of body sizes at a given time with the predicted distribution of body sizes was made using measures of kurtosis, skewness, and the coefficient of variation, as well as visual inspection.
Coefficient of variation (CV) was used to determine rainfall variability.
For each geometric sand wave property the coefficient of variation was determined.

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