How to interpret certain features? [more inside]
posted by noztran on Nov 6, 2009 - 0 answers

I have a dataset of tuples which consists of 3 nominal variables (categories): X (10 different values), Y (500,000 different values), and Z (4 different values). What statistical method can I use to find correlation between all 3 variables? I feel like this is a contingency table but not sure what to do from there. [more inside]
posted by tasty on Nov 11, 2008 - 4 answers

How to cluster when dealing with more than one factor? [more inside]
posted by Blazecock Pileon on Sep 30, 2008 - 8 answers

Can one perform Pearson's correlation or a variant with unequal numbers of rows? [more inside]
posted by Blazecock Pileon on May 1, 2008 - 7 answers

We've all heard correlation does not imply causation. What does? Are there any statistical methods for showing a causal relationship? If there are, when/by whom were they developed? [more inside]
posted by whimwit on Jan 8, 2008 - 33 answers

If I'm looking at existing statistical data, how do I try to find a correlation between two variables over time? Scatterplots have confused me, because they don't seem to reflect the passage of time, but just where x and y meet. Pearson's r doesn't seem to do it either w/r/t time. [more inside]
posted by trondant on Dec 11, 2007 - 13 answers