Now to my problem. Look at the formula in this URL:
http://www.jannesgallery.com/corr.html.
How do I do the first (X-X(with a line above))? I have tried to take
_
X-X
1-3.5=2.5
2-3.5=-1.5
3-3.5=-0.5
3-3.5=-0.5
4-3.5=0.5
4-3.5=0.5
5-3.5=1.5
6-3.5=2.5
________
0
As you see the answer is zero. What do I do wrong? and the same with
Y-Y(with a line above). It turns out to be zero. Please help me to tell
how I should do.
Janne
>As you see the answer is zero. What do I do wrong? and the same with
>Y-Y(with a line above). It turns out to be zero. Please help me to tell
>how I should do.
>
>
Study your formula more closely
What you have to is to take each x value subtract the x mean and
multiply it by its corresponding y value with the y mean subtracted
and add all those rsults to gether
THere are better formulas for calculating r, go to your library and
consult a statistic text
Patrick
Patrick
patr...@netaccess.co.nz (Patrick FitzGerald) wrote in message news:<3c391a8e...@news.netaccess.co.nz>...