jonesy
Guru
Having a look at the document I found this.
Changing a speed limit from 70mph to 60mph results in 94 fewer lives lost.
Changing the speed limit from 70mph to 80mph results in 18 more lives lost.
I assume these figures are modeled based on some collected data. One can, therefore, look at that and suggest that the 10mph difference from 60-70 is considerably more dangerous then the one from 70-80.
One could then manipulate that to suggest that it would be better to drive between 70 and 80mph as fewer lives are lost in that range then at the 60-70mph range!
Stupid really but that is what modeling and statistcal manupulation can give you.
I will read the whole document later, when I have the ability to concentrate on screen reading, and see how another group's opinion differs from this group's opinions.
Stupid certainly, but it tells us nothing about modelling, merely how easy it is to misrepresent numbers if you haven't bothered to find out what they mean....
And this report isn't the opinion of another 'group', it is the informed opinion of people who are experts in road traffic accidents and who have actually looked at the data, instead of just relying on "I think".