I believe I read today a phrase which went something like this:
If a distribution has a mean and a variance ...
So I guess that means some distributions do not have means or variances?
I fiend that a bit difficult to understand - for example:
I could get data which is said to follow such a mean-less and variance-less distribution and as an estimation compute the mean and variance of such a data set.
could someone help shed some light on what I am missing?