Calculating the Pearson correlation coefficient can be complicated but software makes it much easier. You can use several methods to calculate correlation in Excel.

Correlation vs Regression: Both correlation and regression are two powerful tools of statistics and data analysis used to understand the relationships between variables.

The correlation coefficient is a linear regression performed on each stock's returns against the other. If mapped graphically, a positive correlation would show an upward-sloping line.

Although correlation is a symmetric concept of two variables, this is not the case for regression where we distinguish a response from an explanatory variable. This article presents several ways of ...

Jun Shao, Hansheng Wang, Sample Correlation Coefficients Based on Survey Data under Regression Imputation, Journal of the American Statistical Association, Vol. 97, No. 458 (Jun., 2002), pp. 544-552 ...