I didn't know that about how IQ tests are formed. Would that mean that there could be some sliver of the population that could score in the top %'s on the 1000

I didn't know that about how IQ tests are formed. Would that mean that there could be some sliver of the population that could score in the top %'s on the 1000 question test but due to the selection of questions, scored average on the final IQ exam? If so, that'll be my excuse next time I have to take an IQ exam. I just got the wrong distribution.