Look up: Covariance

1. 
   Covariance
   A statistical measure of the degree to which random variables move together.
   Found on http://www.nytimes.com/library/financial
   
   
2. 
   Covariance
   A measure of the extent to which two economic or statistical variables move up and down together. For two variables x and y with values xi, yi, i=1,...,n, the covariance is cov(x,y) = Si=1...n(xi-m(x))(yi-m(y)), where m(·) is the mean of the values in its argument.
   Found on http://www-personal.umich.edu/~alandear/
   
   
3. 
   Covariance
   A statistical measure of the degree to which two variables (e.g., securities' returns) move together. A positive value means that, on average, they move in the same direction.
   Found on http://wps.pearsoned.co.uk/wps/media/obj
   
   
4. 
   Covariance
   A measure of the comovement between two variables.
   Found on http://www.exchange-handbook.co.uk/index
   
   
5. 
   covariance
   [n] - statistical measure of the variance of two random variables measured in the same mean time period
   Found on http://www.webdictionary.co.uk/definitio
   
   
6. 
   Covariance
   The variation in common between two related variables. See also Analysis of covariance.
   Found on http://www.conceptstew.co.uk/PAGES/s4t_g
   
   
7. 
   Covariance
   A measure of the strength of the relationship between two numbers...more on Covariance
   Found on http://moneyterms.co.uk/c/
   
   
8. 
   Covariance
   A measure of the joint variability of a pair of numeric variables. It is based upon the sum of crossproducts of the values other variables.AutocovarianceThe degree to which a time signal is correlated with itself.Cross CovarianceThe degree to which two time signals are correlated.
   Found on http://www.diracdelta.co.uk/science/sour
   
   
9. 
   covariance
   the first product moment of two variates about their mean values Category: Mathematics
   Found on http://www.mijnwoordenboek.nl/definition
   
   
10. 
    Covariance
    Definition (keystage 4) A statistic which measures the agreement between two sets of data. For variables X and Y, with means x and y, the covariance is Cov(X,Y)=E(XY)-xy. <br /> The covariance of two samples of equal size x i , y i is: c xy = ∑ i 1 n ( x i - x ¯ ) ( y i - y ¯ ) . <br /> Covariance depends on the sca ...
    Found on http://thesaurus.maths.org/mmkb/entry.ht
    
    
11. 
    Covariance
    Definition (undergraduate level) The covariance of random variables X and Y is <br /> cov ( X , Y ) = E ( ( X - E X ) ( Y - E Y ) ) . <br /> The correlation of X and Y is <br /> corr ( X , Y ) = cov ( X , Y ) var ( X ) var ( Y ) . <br /> It takes values in [ - 1 , 1 ] and indicates the degree of linear correlation between X ...
    Found on http://thesaurus.maths.org/mmkb/entry.ht
    
    
12. 
    covariance
    noun (statistics) the mean value of the product of the deviations of two variates from their respective means
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
13. 
    Covariance
    In probability theory and statistics, `covariance` is the measure of how much two random variables vary together (as distinct from variance, which measures how much a single variable varies). If two variables tend to vary together (that is, when one of them is above its expected value, then the other variable tends to be above `its` expected value too), then the covariance between the two variables will be positive. On the other hand, if one of ...
    Found on http://en.wikipedia.org/wiki/Covariance
    
    
14. 
    covariance
    (ko-vār´e-әns) 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.
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
15. 
    covariance
    (from the article `probability theory`) ...and â = () (). The numerator of the expression for is called the covariance of and and is denoted Cov(, ). Let = â + denote the optimal ...
    Found on http://www.britannica.com/eb/a-z/c/152
    
    
16. 
    Covariance
    A statistical measure showing the degree to which variables move together. Discover What It’s Like to Live Easy With EquiTrend
    Found on http://www.equitrend.com/glossary677.asp
    
    
17. 
    Covariance
    A measure of the extent to which two economic or statistical variables move up and down together. For two variables x and y with values x_i, y_i, i=1,…,n, the covariance is cov(x,y) = S_i=1…n(x_i-m(x))(y_i-m(y)), where m(·...
    Found on http://www-personal.umich.edu/~alandear/
    
    
18. 
    covariance
    The tendency of two random variables to move in tandem. This is important in applications such as survey-taking and sociology, as well as in many branches of science, because, if two things tend to vary together, there is a good chance they may be causally linked. Related entry &nbs...
    Found on http://www.daviddarling.info/encyclopedi