Pearson's correlation coefficient

In statistics, the Pearson product-moment correlation coefficient (/ˈpɪərsɨn/) (sometimes referred to as the PPMCC or PCC or Pearson's r) is a measure of the linear correlation (dependence) between two variables X and Y, giving a value between +1 and −1 inclusive, where 1 is total positive correlation, 0 is no correlation, and −1 is total negative correlationIt is widely used in the sciences as a measure of the degree of linear dependence between two variables.

• Perfect relationship : 1
• Strong relationship : 0.75-1
• Moderate relationship : 0.5-0.75
• Weak relationship : 0.25-0.5

• Note that pearson correlation is for
• linear correlation only
• without outliers

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