Coefficient de variation

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• Coefficient De Variation — En théorie des probabilités et statistiques, le cœfficient de variation est une mesure de la dispersion relative : il se calcule comme le rapport entre l écart type et la moyenne . Ce nombre est sans unité ; c est une des raisons pour… …   Wikipédia en Français

• Coefficient de variation — ● Coefficient de variation rapport, exprimé sous forme de pourcentage, de l écart type à la valeur absolue de la moyenne ou de l espérance mathématique …   Encyclopédie Universelle

• Coefficient of variation — In probability theory and statistics, the coefficient of variation (CV) is a normalized measure of dispersion of a probability distribution. It is also known as unitized risk or the variation coefficient. The absolute value of the CV is sometimes …   Wikipedia

• Coefficient Of Variation - CV — A statistical measure of the dispersion of data points in a data series around the mean. It is calculated as follows: The coefficient of variation represents the ratio of the standard deviation to the mean, and it is a useful statistic for… …   Investment dictionary

• coefficient of variation — or coefficient of variability : the ratio of the measure of variability, usually the standard deviation, to an average, usually the arithmetical mean, about which the variation occurs …   Useful english dictionary

• coefficient of variation — A measure of investment risk that defines risk as the standard deviation per unit of expected return. Bloomberg Financial Dictionary …   Financial and business terms

• coefficient of variation — (CV) the standard deviation divided by the mean, sometimes multiplied by 100; a unitless quantity indicating the variability around the mean in relation to the size of the mean …   Medical dictionary

• coefficient of variation — (CV)    A statistical measure of dispersion relatin the measure of dispersion (SD) to the average of mean (X). CV = SD X × 100 …   Forensic science glossary

• variation — [ varjasjɔ̃ ] n. f. • 1314; lat. variatio 1 ♦ État de ce qui varie au cours d une durée; suite des changements qui affectent ce qui varie. ⇒ changement, évolution. « La variation du regard en vitesse, en direction, en durée » (Valéry). « La… …   Encyclopédie Universelle

• Variation — means a change within population* Biodiversity * Genetic diversity, differences within a speciesPhysics: * Magnetic variation, difference between magnetic north and true north, measured as an angle * Variation (astronomy), any perturbation of the …   Wikipedia