Correlation Calculator
Calculate Pearson r
Formula
r = [nΣxy - (Σx)(Σy)] / √{[nΣx² - (Σx)²][nΣy² - (Σy)²]}
Frequently Asked Questions
What is Pearson's correlation coefficient?
Pearson's r measures the strength and direction of the linear relationship between two variables. It ranges from -1 (perfect negative) to +1 (perfect positive), with 0 meaning no linear correlation.
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