Is Google Using Pearson Correlation Coefficient as a Ranking Factor

Following on from last weeks post about the Google delegated authority evaluation system and primary authority and contributing authorities This weeks post is about Pearson Correlation Coefficient (r)

I spoke last week about how primary authorities can pass on an evaluation score between -1 and +1 is it any coincidence that Correlation coefficients range from r=-1.0 to r=+1.0?

October 10, 2013

Additional Information about Pearson product-moment correlation coefficient via Wikipedia

“In statistics, the Pearson product-moment correlation coefficient (sometimes referred to as the PPMCC or PCC,[1] 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 negative correlation.”

Source: Wikipedia

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