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PCC
Pearson correlation coefficient (PCC, pronounced /ˈpɪərsən/), also referred to as the Pearson's r or Pearson product-moment correlation coefficient (PPMCC), is a measure of the linear dependence (correlation) between two variables X and Y. It has a value between +1 and −1 inclusive, where 1 is total positive linear correlation, 0 is no linear correlation, and −1 is total negative linear correlation.