Stu wrote: > > "Silvert, Henry" wrote: > > > Might I go one step further and point out the correlation does not establish > > a causal relationship primarily because it does not point to directionality, > > at least not without a working hypothesis and some background support. > > Absolutely. Without both a working hypothesis and a literature search one could > say that cancer causes cigarette smoking. > > Stu > Garfield High School > Los Angeles
If you have two variables (numerical) you can allways calculate the correlation coefficient. Usually I show this to my students http://noppa5.pc.helsinki.fi/koe/corr/cor7a/cor7a.html and ask if it is sensible to calculate or use correlation in this case. -- Juha Puranen Department of Statistics P.O.Box 54 (Unioninkatu 37), 00014 University of Helsinki, Finland http://noppa5.pc.helsinki.fi ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================
