correlation

英 [,kɒrə'leɪʃ(ə)n; -rɪ-] 美[,kɔrə'leʃən]

• n. [数] 相关，关联；相互关系

1. a reciprocal relation between two or more things

2. 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?"

3. 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