Product-moment Correlation Coefficient (PMCC)

[tanyuj]

ok Im slightly confused how my teacher got this answer using this formula:
http://farm3.static.flickr.com/2173/2188674453_fe036ce6b7.jpg

http://farm3.static.flickr.com/2164/2188642809_53354a9713_o.png

using the Sxy/√Sxx-Syy

4595-(142x130)/7 = 1029.28 }this section is the top part of the equation...
Im not sure how this equals to 1029.28
I keep getting: 1957.857

[KatieB]

The sum of x (the first column is wrong) I make it 192

If you do the calculation again you should get r=0.94179....

Hope you can now get this answer.

[tanyuj]

thanks Katie..I must have copied the board wrongly...

http://i19.tinypic.com/85a6gsi.png
when I put these into the equation the top part gets a negative number..
=-5333.636364...
is this right?..

[KatieB]

I get -5342.636364

[tanyuj]

oh sorry my mistake, again.

I got -5342.636..too
is it ok to get a minus though\?..
have i done a step wrongly?