The Coefficient of Determination is the r squared value (r²). This figure tells us how much the variation in the dependent variable can be explained by the variation in the independent variable (note: not whether one causes the other), and because r values have to be between -1 and +1, these r² values always fall [...]

Pearson’ product-moment correlation coefficient is the “r” value we associate with data distributions. It’s a measure of how well two variables correlate to one another — how strong the relationship is, how much they affect one another. For example, your height has an effect on your weight (the taller someone is, the more they weigh [...]