Partial Correlation
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Partial Correlation

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High Quality Content by WIKIPEDIA articles! In probability theory and statistics, partial correlation measures the degree of association between two random variables, with the effect of a set of controlling random variables removed. Formally, the partial correlation between X and Y given a set of n controlling variables Z = {Z1, Z2, ?, Zn}, written ?XY·Z, is the correlation between the residuals RX and RY resulting from the linear regression of X with Z and of Y with Z, respectively. In fact, the first-order partial correlation is nothing else than a difference between a correlation and the p...