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સહસંબંધાંક, મઘ્યક \( \bar{x}=\frac{\Sigma x}{n}, \; \bar{y}=\frac{\Sig…

- - - - \( r=\frac{n\Sigma xy-(\Sigma x)(\Sigma y)}{\sqrt{n\Sigma x^{2}-(\Sigma x)^{2}}\cdot \sqrt{n\Sigma y^{2}-(\Sigma y)^{2}}} \)
    - - \( r=\frac{n\Sigma uv-(\Sigma u)(\Sigma v)}{\sqrt{n\Sigma u^{2}-(\Sigma u)^{2}}\cdot \sqrt{n\Sigma v^{2}-(\Sigma v)^{2}}} \)