** Computer Game #1
--- Regression by Eye**

## Instructions

A "Begin" button will appear at the bottom of this file when the applet is
finished loading. This may take a minute or two depending on the speed of your
internet connection and computer. Please be patient. If no begin button appears, it is probably because your browser does not support Java
1.1.

Starting the Applet and
setting the conditions

Press the "Begin" button to start the applet in another window.

This applet lets you estimate the regression line and to guess the value of
Pearson's correlation.

1. Select
the "Show minimum MSE" option. The mean square error (MSE) is the
average squared deviation of points from the line.

2. Indicate
your estimate of the regression line by drawing a line on the scatterplot. When you release the mouse button the MSE from
the line you drew will be displayed.

3. You
can draw another line and see if you can lower the MSE.

4. To
see the best fitting line (by the criterion of least squares)
select the "Draw regression line" option.

5. Five
possible values of Pearson's correlation are listed. One of them is the
correlation for the data displayed in the scatterplot.
Guess which one it is.

6. To
see the correct value of Pearson's correlation, click on the "Show r"
button.

7. Click
the "New Data" button to try again.

Repeat the above steps until you have (a) drawn a regression line that comes
within 5 of the minimum MSE and (b) estimated the correlation correctly four
times in a row.

Source: http://www.ruf.rice.edu/~lane/rvls.html