I’m late getting to this (see Glenn and Jonah’s takes), but I highly recommend Stuart Buck and Megan McArdle’s analysis of math and the media:

When we wrote this up on our blogs, many conservative readers attributed the misleading figures to liberal media bias. But it is more likely ignorance than malice. Every year, scores of fledgling journalists pour out of liberal arts programs. Though many will need to pick through mountains of statistics in search of the truth, few have been taught the skills to do it.
They quickly become victims of advocacy groups pushing skewed statistics. Through ignorance, they may also start manufacturing their own flawed numbers. Since number-crunching beats (such as business and finance) are generally viewed as a tedious waystation en route to more interesting beats, few are enthusiastic about developing these skills. And their editors may not be in any position to help them. […]
Even worse, as mathematician John Allen Paulos is fond of pointing out, Americans are often too innumerate to analyze statistics printed in the newspaper. America’s schools haven’t given its citizens any more ability than its journalists to analyze the information that floods our lives. We would call it a case of the blind leading the blind, but the comparison is inappropriate. Blind people know they can’t see.

This points to an argument for statistical blogs like Mystery Pollster and others as essential complements to the mainstream media.