Our nine-point guide to spotting a dodgy statistic, The Observer Science 17.07.2016

David Spiegelhalter is the Winton Professor of the Public Understanding of Risk at the University of Cambridge
and president elect of the Royal Statistical Society

Les chiffres et leurs usages par les politiciens et leurs communicants

9 exemples, avec l’aide de Full Fact

Use a real number, but change its meaning
Make the number look big (but not too big)
Casually imply causation from correlation
Choose your definitions carefully
Use total numbers rather than proportions (or whichever way suits your argument)
Don’t provide any relevant context
Exaggerate the importance of a possibly illusory change
Prematurely announce the success of a policy initiative using unofficial selected data
If all else fails, just make the numbers up