covariance

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covariance

 [ko-va´re-ans]
a measure of the tendency of two random variables to vary together. It is the expected value of the product of the deviations of corresponding values of two random variables from their respective means.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

covariance

(kō-vā′rē-ăns)
In statistics, the expected value of the product of the deviations of corresponding values of two variables from their respective means.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
In this study, 4th, 5th and 6th AR parameters were calculated from EGG signals of healthy individuals and patients by using Covariance, Burg, Yule-walker, Least Squares and Modified Covariance methods. To compare the methods, the CRLB variance value of these parameters was obtained.
However, the covariance method may lead to unstable AR models since the LD algorithm is not used for solving the covariance normal equations [18].
Scherbaum: Polarization analysis in the wavelet domain based on the adaptive covariance method, Geophysical Journal International, 170, 667-678 (2007).
A statistical analysis using a covariance method determined that the weight loss accounted for just 0.3 of the 0.7 percentage point drop in Hb[A.sub.1c] among the patients in the 20-mg arm.
A statistical analysis using a covariance method determined that weight loss accounted for just 0.3 of the 0.7 percentage point drop in Hb[A.sub.1c] among the patients in the 20-mg arm.