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> My arrows also weren't meant to be implication, just a causal relationship. But in the typical case of a measured correlation, no causal relationship can be
by lutusp 13y ago
> My arrows also weren't meant to be implication, just a causal relationship.
But in the typical case of a measured correlation, no causal relationship can be implied based on the data alone, regardless of the direction. This is especially true in examples of data mining, where many correlations are located that arise purely from chance rather than design.
- dllthomas 13y agoNo particular causal relationship, right. Existence of a causal relationship can be.
- Retric 13y agoHe is referring to the issue where data-mining creates a lot of meaningless correlations. http://xkcd.com/882/ http://xkcd.com/882/ aka many correlations are located that arise purely from chance rather than design A single study is generally close to worthless.
- dllthomas 13y agoYes, the correlation has to be sufficiently unlikely to have arisen by chance. Even in that case, though, our estimate of green jellybeans having some causal relationship with acne should increase.