Correlation Coefficient (CC)
参考:[1] Mukaka M M. A guide to appropriate use of correlation coefficient in medical research[J]. Malawi medical journal, 2012, 24(3): 69-71.correlation coefficient用来衡量两个 连续 变量之间的 线性 相关程度有两种:Pearson’s product moment correlation coefficientr=∑i=1n(xi−