The correlation matrix is a methodical method which exhibits the mutual relationship of countries over a specified time period.
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The mean, standard deviation, variance-covariance matrix, and correlation matrix are calculated from the measurement vectors.
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A " g " factor can be computed from a correlation matrix of test results using several different methods.
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Step 4 : In case of the minimum spanning tree method a metric distance dij is calculated using the cross correlation matrix.
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If the predictor variables are correlated among themselves, the inverse of the correlation matrix R _ { xx } accounts for this.
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Each element on the principal diagonal of a correlation matrix is the correlation of a random variable with itself, which always equals 1.
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Mean-centering is unnecessary if performing a principal components analysis on a correlation matrix, as the data are already centered after calculating correlations.
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The " g " factor can be derived from a correlation matrix of mental ability tests by many different methods of factor analysis.
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It is useful in that it simplifies the estimation of correlation between securities, significantly reducing the inputs for building the correlation matrix required for portfolio optimization.
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A correlation matrix appears, for example, in one formula for the coefficient of multiple determination, a measure of goodness of fit in multiple regression.
