I need to know, is there any way to do regression analysis on non-normal data? I’m analyzing data for the agency I work for. I want to determine the factors which predict our yearly spending per client. However, spending per client is rather skewed to the right – we have several outliers who get substantially more than other clients.

IIRC, one shouldn’t use regression in this case…at least that’s the stats 101 answer. However there are probably more advanced methods for dealing with this problem…anyone? I’m on the verge of regression aggression here.