News agencies are constantly reporting on polls and statistics. Often the same survey questions are asked week after week, and reporters give them back to us as if they were the pulse and pressure of the nation.
But how are these numbers generated? Who is doing the surveys, and how accurate are they?
We hope to shed some light on that issue. Just like blood pressure measurements, some patterns of numbers are extremely unlikely, and may indicate that there is something amiss with the meter rather than the thing being measured.