It DOES NOT matter which is the explanatory/independent variable and which is the response/dependent variable for ____, but it DOES matter for ____.
We know that the correlation coefficient between two variables depends on their data sets, but does not depends on the dependent variable or independent variable
so,we can say that correlation coefficient r is independent from variable type
Slope is defined as the change in y or dependent variable per unit change in the independent variable
so, it does matter for the slope that which variable is independent and which is dependent variable
therefore, we can write
It DOES NOT matter which is the explanatory/independent variable and which is the response/dependent variable for correlation coefficient r, but it DOES matter for slope
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