After looking at the relationship between spam rules and spam scores in my private spam collection, I decided it was time to look at how spam rules and spam scores are distributed.
The first thing I did was create a histogram of spam scores. It looks a bit like the normal distribution, but the spam threshold makes it hard to determine, given that we're only getting spam scores over a certain threshold.
But what about the number of rules triggered? Does it conform to the normal distribution? Again, it's close, but it is somewhat skewed to the right.
But how much does it depart from the standard distribution? And just what kind of distribution is it, anyhow?