What is the difference between N and N-1 in calculating population variance?
I did not get the why there are
N-1 while calculating population variance. When we use
N and when we use
It says that when population is very big there is no difference between N and N-1 but it does not tell why is there N-1 at the beginning.
Edit: Please don’t confuse with
n-1 which are used in estimating.
Edit2: I’m not talking about population estimation.