This is a multi-part message in MIME format. --------------871448A000A42FB121E62065 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit
another way to phrase thatis for each case find x= X_XBAR and y = YBAR then multiply x*y (this is called a cross-product). then find the sum of the crossproducts. Stephen Clark wrote: > "janne" <[EMAIL PROTECTED]> wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > 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 > > > The sum is: > > (1-3.5)*(68-103.625) + (2-3.5)*(91-103.625) + ... + (6-3.5)*(127-103.625) > > which, in general, will not be zero. --------------871448A000A42FB121E62065 Content-Type: text/x-vcard; charset=us-ascii; name="Arthur.Kendall.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Art Kendall Content-Disposition: attachment; filename="Arthur.Kendall.vcf" begin:vcard n:Kendall;Art tel;work:301-864-5570 x-mozilla-html:FALSE adr:;;;;;; version:2.1 email;internet:[EMAIL PROTECTED] fn:Art Kendall end:vcard --------------871448A000A42FB121E62065-- ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at http://jse.stat.ncsu.edu/ =================================================================
