Lies, damn lies and statistics - Do speed cameras really lower accident numbers or are the authorities taking advantage of statistical anomalies?

摘要

timing is perfect. Just as the next generation of speed camera technology has boen unveiled. a statistical phenomenon known as regression to mean is blowing apart the view promoted by police, and politicians that speed cameras save lives. More on the new earner a in a minute, but first, a new debate about speed cantoras is raging after a recent publicity stunt in London. It all began when the group that runs the city's speed cameras began handing out sunflower seeds to primary school children to clebrate the Iives of 1500 people who had been saved from death or injury by speed cameras in the preceding five years.