W: (n) correlation [Related to: correlate] (a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other)
W: (n) correlation [Related to: correlate] (a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation)) "what is the correlation between those two variables?"