Missing the weirdest one, which I sadly can't find on the net right now because I lost the name: What's the average population size of alien planets when you a

Missing the weirdest one, which I sadly can't find on the net right now because I lost the name: What's the average population size of alien planets when you are one in 7 billion having this question. I don't quite get it together but it had 2 interesting problems: - It allows for a prediction with a simple size of just 1 which differed from said sample - it's debatable if we should calculate with 7 billion humans or one globalized "intelligent" race If anyone could point me to a source to this I'd be happy :) also related: the german tank problem https://www.eadan.net/blog/german-tank-problem/ https://www.eadan.net/blog/german-tank-problem/