I don't know what you're trying to do with it in your hypothetical scenario, but you can judge the expected value of aggressiveness based on distribution for th

I don't know what you're trying to do with it in your hypothetical scenario, but you can judge the expected value of aggressiveness based on distribution for the sex and be right on average. Still stats 101. > Even if a doctor knows that men are 2x as likely to get heart disease, he still needs to check his female patients for it if they exhibit the symptoms. Interesting example, because it's actually one that shows these things are useful. Women have worse outcomes despite lower incidence, because of underreported/played-down chest pain from familiarity with monthly cramp pain. So where we men might be saying 'oh god, my chest, it's the worst thing imaginable', in triage it pays to know that the woman saying 'ooh, my chest feels a little tight' is actually experiencing exactly the same thing.