For those interested in statistical (non-)significance, I want to share what's just happened in Victoria, Australia, where I live. It's long been one of the world's leading jurisdictions in the road safety area, ever since being the first place in the world to make seat belts compulsory. In the months of October and November just past, the states road tolls were 37 and 12 respectively.[[Read about it here]] Now while, inevitably, the top cop involved is trying to take some credit, there was no obvious change in laws or policing over those two months. So really, no conclusion at all can be drawn from the figures, and it's a huge change. Such changes only mean something over much longer terms. In simple terms, what seems like a huge change from 37 to 12 is NOT statistically significant.