in the columns and put the result at the bottom of the column. Are the data from each of the 2 variables (x, y) follow a normal distribution? This equation can also be used to predict values of Y for a value. In 1892, British statistician Francis Ysidro Edgeworth published a paper called Correlated Averages, Philosophical Magazine, 5th Series, 34, 190-204 where he used the term Coefficient of Correlation. Sample correlation coefficient, sx and sy are the sample standard deviations, and sxy is the sample covariance.