Statistical ratios | Covariance and correlation

Quadrant count ratio

The quadrant count ratio (QCR) is a measure of the association between two quantitative variables. The QCR is not commonly used in the practice of statistics; rather, it is a useful tool in statistics education because it can be used as an intermediate step in the development of Pearson's correlation coefficient. (Wikipedia).

Quadrant count ratio
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Related pages

Standard deviation | Average absolute deviation | Statistics | Quadrant (plane geometry)