Safe Speed Forums

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I dont understand how the claimed 69pc is right given that only 100 people a year nationawide are saved by speed cameras!

I can't believe there is not more of a public outcry about their dubious figures these SCPs publish.

How did they achieve the impressive figure of 69%?

I wonder what they have used as their baseline?

Do their statistics allow for regression to the mean? Are they statistically significant? I very much doubt it.

100......is that all

Hardly even a statistic

Thats 2 per police authority

How can you tell how many people have not been killed

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Speed camera policy Kills

Just some more Ladyboy Cobblers.

These statistics rely on the fact that people are so poorly-educated in maths that all they see is 'rise' or 'reduction' and a big or small number.

Over a third of adults in this country have difficulty understanding percentages, let alone analytical statistics.

The 68% probably refers to the drop in KSI's where speed was shown to be in excess of the prescribed limit and the major cause of injury (about 15% of all KSI's), so the simple, non-regressed drop was actually 68% of 15%, about 10.2% and, if regressed correctly (can't be arsed to do the maths) probably less than 9%.

A 68% reduction or a 9% reduction - which would you present if you were trying to justify racketeering the motorist?

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Aquila



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