Scatter Slider : Correlation & Line of Best Fit mod
- Author:
- JimD, Terry Lee Lindenmuth
- Topic:
- Correlation
This applet was shared by tlindy and was slightly modified by JimD.
Move the scatter slider back and forth between "Strong Negative" and "Strong Positive" correlations.
Note that with a perfect negative correlation (r= -1.00), all of the points fall on the best-fitting line (r^2= 1.00).
Note that with a perfect positive correlation (r= +1.00), all of the points fall on the best-fitting line (r^2= 1.00).
Note that the "MnXMnY" point (Mean of the Xs, Mean of the Ys) always falls on the best-fitting line.
When r= 0, the best-fitting line provides no useful prediction (r^2= 0). The best one can do is to always predict (Mean of the Xs, Mean of the Ys).