相关系数
相关系数，又称作 关联系数（英语：correlation coefficient）是一种相关程度的测量，在统计学上的意义是两个变量之间的关系。[1]关系系数与“皮尔逊积矩相关系数”并不相同。英国数学家法兰西斯·高尔顿最先发展了相关概念。
参考文献
- ^ correlation coefficient. NCME.org. National Council on Measurement in Education. [April 17, 2014]. （原始内容存档于2017-07-22）.
correlation coefficient: A statistic used to show how the scores from one measure relate to scores on a second measure for the same group of individuals. A high value (approaching +1.00) is a strong direct relationship, values near 0.50 are considered moderate and values below 0.30 are considered to show weak relationship. A low negative value (approaching -1.00) is similarly a strong inverse relationship, and values near 0.00 indicate little, if any, relationship.