I have a correlation formula I don't get to work. And we must use this formula on the test. Let me give you an example: Let's say X and Y are: x y 1 68 2 91 3 102 3 107 4 105 4 114 5 115 6 127 _ ___ 28 829 _ _ X is =3.5 and Y is =103.625
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 ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at http://jse.stat.ncsu.edu/ =================================================================