Markus commented on the "first-borns are smarter - yeah, right" post.
markus :-) said...
Talk about a representative population! 250,000 Norwegian men signing up for the military between '85 and '04.
I'll go one better and say that, because of the representative population, they figured that 2.3 points on an IQ test are a big deal and blew it way out of proportion. Because that's what, a 47% difference in their statistical sample?