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Variance |
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VarianceA measure of how much an economic or statistical variable varies across values or observations. Its calculation is the same as that of the covariance, being the covariance of the variable with itself.VarianceThe difference between budgeted and actual costs.VarianceA measure of dispersion of a set of data points around their mean value. The mathematical expectation of the average squared deviations from the mean. The square root of the variance is the standard deviation.Variance Similar MatchesMean variance analysisMean variance analysisEvaluation of risky prospects based on the expected value and variance of possible outcomes. Minimum variance portfolioMinimum variance portfolioThe portfolio of risky assets with lowest variance. Minimum variance frontierMinimum variance frontierGraph of the lowest possible portfolio variance that is attainable for a given portfolio expected return. ComvarianceComvarianceAn analogue to covariance for three variables. For three variables x, y, and z with values xi, yi, zi, i=1,…,n, the comvariance is com(x,y,z) = Si=1…n(xi-m(x))(yi-m(y))(zi-m(z)), where m(·) is the mean of the values in its argument. Due to Deardorff (1982). CovarianceCovarianceA statistical measure of the degree to which random variables move together. A positive covariance implies that one variable is above (below) its mean value when the other variable is above (below) its mean value. Further SuggestionsPortfolio varianceVariance rule Variance minimization approach to tracking Serial covariance Mean variance criterion Covariance |
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