I'd guess in the US, where the average age at first birth is 27. This is rather early by developed world countries; in most it's closer to 30, and in some it's above 30.
there is no average US citizen, it makes no sense to assert based on that. Demographics are fundamentally groups of groups, that are different. People here on YNews would recognize quickly "overfitting" or other statistical errors, but this demographic human quality somehow eludes public conversation.
no - in real life, each person has a child at some age. An aggregate of those numbers is still showing individual lives. Similar reasoning for "2.5 children" .. that is "average" but exactly zero people out of millions have 2.5 children in reality.
no sorry, its a beginner mistake to think that there are average people at all. For example, people who are not adults.. there is no meaning to "average" for children at 2 years, 6 years, 8 years, 12 years.. they are different. Its not an average.. it is a collection of groups.. Human populations are collections of groups that overlap in characteristics.. there is no "average" person
from the other side, a real number product of mean, average etc. is .. a number. You can do lots of math with numbers, and you will get consistent results in a number sense.. but the model is not the creation
