This was my first thought also (although 7 hours later!), it may be interesting to look at skew as well as variance (kurtosis is probably going too far), the di

This was my first thought also (although 7 hours later!), it may be interesting to look at skew as well as variance (kurtosis is probably going too far), the difference between diffuse normally distribution and split peaks... It may even be interesting to do some kind of k-means, would be awesome to see that correlate with demographic...