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correlation coefficient[‚kär·ə′lā·shən ‚kō·i′fish·ənt]
A measurement, which is unchanged by both addition and multiplication of the random variable by positive constants, of the tendency of two random variables X and Y to vary together; it is given by the ratio of the covariance of X and Y to the square root of the product of the variance of X and the variance of Y.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
correlation coefficienta measure of the association between two variables. See CORRELATION, PEARSON PRODUCT MOMENT CORRELATION COEFFICIENT, SPEARMAN RANK CORRELATION COEFFICIENT.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000