“There are three types of lies,” Mark Twain famously quipped, “lies, damned lies, and statistics.”
I know he was overstating the case somewhat, but my time in higher education has given me plenty of opportunity to see that he was not far off. Statistics have a way of impressing people with the apparent solidity of the numbers they generate. Many of us, especially the numerically inclined, tend to think they’re telling us something profound, truthful and scientific. But I have discovered that often they are not, and until you know how the numbers were obtained and how they are being interpreted, you can never be quite sure how solid they really are.