interesting statistical detective work
Wednesday, June 30th, 2010Techdirt has details of how some statistics experts determined that a company called R2K was faking their polls for the Daily Kos
The first thing they noticed was that when R2K did polls that tested how men and women viewed certain politicians or political parties (favorable/unfavorable) there was an odd pattern: if the percentage of men that rated a particular politician favorable or unfavorable was an even number, so was the the percentage of female raters. It seemed like these two points always matched up. If the male percentage was even the female percentage was even. If the male percentage was odd, the female percentage was odd. Yet, as you should know, these are independent variables, not influenced by each other. That 34% of men find a particular politician favorable should have no bearing on why an even percentage of women find that politician favorable. In fact, this happened in almost every such poll that R2K did, to such a level as to suggest it being as close to impossible as you can imagine.
I love stories of detecting information inside of information. I think that is why I liked the Lisbeth Salander books so much.
