added: anybody know the original quote from Churchill?
The only reference to Churchill and statistics that I found was:
I gather, young man, that you wish to be a Member of Parliament. The first lesson that you must learn is, when I call for statistics about the rate of infant mortality, what I want is proof that fewer babies died when I was Prime Minister than when anyone else was Prime Minister. That is a political statistic.
Not sure that's what you're thinking of, but it fits the concept.