How do you calculate r = the regression please?
To calculate the coefficient of correlation (r) in a regression analysis, you can use the following formula:
r = ∑(XY) - (n)(mean of X)(mean of Y) / √[(∑X^2 - n(mean of X)^2)(∑Y^2 - n(mean of Y)^2)]
In this formula:
- ∑(XY) is the sum of the product of X and Y values
- n is the number of data points
- mean of X is the average of the X values
- mean of Y is the average of the Y values
- ∑X^2 is the sum of the squares of the X values
- ∑Y^2 is the sum of the squares of the Y values
Alternatively, you can use statistical software or tools like Microsoft Excel to calculate the coefficient of correlation in a regression analysis.