Pearson Correlation Coefficient Formula

Correlation(r) = NΣXY - (ΣX)(ΣY) / Sqrt([NΣX² - (ΣX)²][NΣY² - (ΣY)²])

Where,

N = Number of Values or Elements

X = First Score

Y = Second Score

ΣXY = Sum of the Product of First and Second Scores

ΣX = Sum of First Scores

ΣY = Sum of Second Scores

ΣX² = Sum of Square of First Scores

ΣY² = Sum of Square of Second Scores