On Tue, Dec 10, 2013 at 11:32 AM, Claudio Freire <klaussfre...@gmail.com> wrote: > On Tue, Dec 10, 2013 at 11:02 AM, Greg Stark <st...@mit.edu> wrote: >> >> On 10 Dec 2013 08:28, "Albe Laurenz" <laurenz.a...@wien.gv.at> wrote: >>> >>> >>> Doesn't all that assume a normally distributed random variable? >> >> I don't think so because of the law of large numbers. If you have a large >> population and sample it the sample behaves like a normal distribution when >> if the distribution of the population isn't. > > > No, the large population says that if you have an AVERAGE of many > samples of a random variable, the random variable that is the AVERAGE > behaves like a normal.

Sorry, that should be "No, the *law of large numbers* says..." -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers