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Pearson Correlation Coefficient

A measure from minus one to one of the linear relationship between two paired variables after subtracting their means. Applied pixelwise to two channels it reports covariation of intensities, independent of absolute brightness but sensitive to background offset.

Questions this Concept answers

Two variables give \( r = 0.02 \), yet their scatter plot shows a tight U-shaped curve. How can both be true?

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Pearson Product-Moment Correlation Coefficient in Statistics

The Pearson product-moment correlation coefficient measures the strength and direction of the linear relationship between two quantitative variables, denoted r for a sample statistic and rho (ρ) for …