Name: _____________________________________________
Regression Internet Activity
Name: _____________________________________________
Regression Internet Activity
I. Guessing correlation
http://www.stat.uiuc.edu/~stat100/java/GCApplet/GCAppletFrame.html
I. Guessing correlation
http://www.stat.uiuc.edu/~stat100/java/GCApplet/GCAppletFrame.html
Record your best score out of 20 ______________________
Record your best score out of 20 ______________________
II. Regression line
http://www.ruf.rice.edu/~lane/stat_sim/reg_by_eye/index.html
II. Regression line
http://www.ruf.rice.edu/~lane/stat_sim/reg_by_eye/index.html
Using the mouse, draw in the LSRL. Check to see how close you are.
Guess the value of the correlation coefficient.
Do at least 10 data sets.
Using the mouse, draw in the LSRL. Check to see how close you are.
Guess the value of the correlation coefficient.
Do at least 10 data sets.
III. Influential points
http://www.stat.sc.edu/~west/javahtml/Regression.html
III. Influential points
http://www.stat.sc.edu/~west/javahtml/Regression.html
Write the new equation and value of r obtained by adding each of the following
points. (add points by clicking on location of point)
Write the new equation and value of r obtained by adding each of the following
points. (add points by clicking on location of point)
(10,200) yˆ = ________________________________
(10,200) yˆ = ________________________________
r = _____________
r = _____________
(100,200) yˆ = ________________________________ r = _____________
(100,200) yˆ = ________________________________ r = _____________
(200,100) yˆ = ________________________________ r = _____________
(200,100) yˆ = ________________________________ r = _____________
(200,10)
yˆ = ________________________________ r = _____________
Which point(s) seem to have the greatest influence on changing the LSRL?
(200,10)
yˆ = ________________________________ r = _____________
Which point(s) seem to have the greatest influence on changing the LSRL?