Epidemiology–stats in general–is becoming something of a problem.
Friend: Okay, what is the incidence of asthma in South Africa?
Me: *paging furiously* Did they tell us that?
Friend2: They didn’t need to. Research outcomes…
Friend: So, then, what is the answer?
Friend2: Um…they give us the prevalence, I think. Seventeen percent.
Me: So, they didn’t tell us the incidence. Let’s move on…
Friend2: Thirty-three point three percent.
Friend: How did you get that?
Friend2: There are three of us. One of us has asthma. Therefore, the incidence is 33%.
*Longer confused silence*
Friend: Um…okay. But, you do realize that doesn’t really count as legitimate research, right? Aside from the obvious–like the sample size…
Friend2: You’re majoring in the minors.
Me: Okay. Let’s say we accepted that. We still don’t have an answer, because now you’ve just given us a different value for prevelance.
Friend 2: Um…oh. Okay. Let’s move on then.