I have a copy of the shorter Oxford English Dictionary from 1970 which I inherited. It is two massive volumes and is only shorter in comparison to the full dictionary which is 12 volumes (more in more modern editions). My shorter OED contains 163,000 words (compared to the 600,000 words of the longer). According to this site I know 71,000 words... Let's test that against the OED. I should have about 43% chance if kno…
can't assume gaussian underlying distribution of the word-knowing, it's known zipfian. so you can't be doing anovas or anything of that nature because if you look up zipfian distribution's variance, you get Nature and Reality giving you the middle finger
(The median English speaker almost certainly knows several thousand words, or word stems to avoid duplication. But the number who know all words in the tail is exceptionally small.)