Wednesday 21 April 2010

"Normal" people and the normal curve...

I recently had a discussion about what normal people are. It reminded me of the incredible intolerance that pervades society, and for most of us is keenly felt from childhood in one way or another. Do normal people exist, then? My answer is maybe, but they're very few.

Why? The answer lies in a weird and geeky approach: Mathematics defines "normal" in terms of an average and probability of being there. Let's say that for each characteristic we imagine, we can draw a scale that ranges from something negative to positive, or bad to good (for simplicity, let's ignore times where there can be "too much of a good thing"). In our imaginary world, there is a majority of people in the good normal range, and a 5% of people who have a negative "difference" or fault. In the normal curve it looks like this:


In simple terms, for any one characteristic, the story looks like this. 95% "normal" and 5% "weird":


However, when we have more than one characteristic, things begin to become complicated. As we increase the number of traits, so do we decrease the number of people who are "perfectly normal" and who do not have at least one fault or weirdness. If we have barely 14 traits, the number of "different" people becomes greater than that of "normal" individuals...


...and once the number of traits hits 59, the tables turn, and it's the so-called "normal" people who are outstripped by the rest of us, the "weirdos". I'm sure we can find these 59 traits, or more (if you'd like to contribute, leave a comment :-).


The take-home message is that we should be tolerant of people's wierdnesses and faults, as well as our own. The inevitable result is that we'll be better and happier for it.