Tuesday, May 09, 2006
must love logit
Today I heard about a female biostatistician who went on a date with a man who advertised on craigslist that he was looking to go out with a woman who knew what logistic regression was.
As a public service to my nonquanticognoscenti female readers out there who wouldn't want to let a catch like this slip away, it's an analogue of linear regression for binary outcome variables; it can be derived by positing the outcome to be the binary manifestation of a latent continuous variable whose distribution conditional on the explanatory variables is logistic. If asked about it in a speed-dating context, you could probably just wink and say "linear in the logit, baby" and be fine, at least so long as you know that it's pronounced LOW-jit.
If you would like to be sassy, you can also retort that you won't go out with him until he proves he knows how to interpret an interaction effect from a logistic regression model, as all kinds of people mess that up, including hordes of smartypantsed economists and, well, me. If you show him interpretations and tests based on derivatives, he will almost certainly swoon; and if you combine these with a revealing graph of predicted probabilities, you may well stop his heart.