4 ms·
Could you please give an example? It may be that he is defining causal more narrowly and correlate more broadly than you are.
by msellout 12y ago
Could you please give an example? It may be that he is defining causal more narrowly and correlate more broadly than you are.
- deleted 12y ago[deleted]
- afafsd 12y agoHow about this? Playing soccer causes broken hips, but soccer playing is in fact anti-correlated with broken hip incidence. Why? Because most broken hips occur among extremely old people, who generally don't play soccer. [I'm not sure whether this is actually statistically true, but you get the idea, and I'm sure there's a similar example which actually is true.]
- tonyl7126 12y agoJust because old people tend to break their hips more often than younger people wouldn't necessarily make soccer anti-correlated with hip injuries. In your example, if you compared two groups that are identical, the only difference being one plays soccer and the other doesn't, you'd find a correlation between soccer and broken hips.
- micro_cam 12y agoAnything non linear or multivariate: http://en.wikipedia.org/wiki/Correlation_and_dependence http://en.wikipedia.org/wiki/Correlation_and_dependence Ie unemployment is not correlated with age since both young and old people tend to be unemployed...it is a non-linear relationship.