Date:         Fri, 30 Jun 2000 12:46:04 -0400
Reply-To:     Jay Weedon <jweedon@EARTHLINK.NET>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Jay Weedon <jweedon@EARTHLINK.NET>
Organization: http://extra.newsguy.com
Subject:      Re: question on variance
Content-Type: text/plain; charset=us-ascii

Well if X is normally distributed, then ((X-mean)/SD)^2 is
chi-square-distributed with one degree of freedom.

FWIW,
Jay.

On 30 Jun 00 02:03:57 GMT, patrickm@MAIL.NEWCASTLE.EDU.AU (Patrick
McElduff) wrote:

>I thank those people who have responded to the question on the variance of x^.
>
>I don't believe that it is useful to use a taylor series expansion.  A
>taylor series is intended to approximate a complex function with a polynomial.
>
>The taylor series expansion of x^2  is only useful if you go to the second
>order term; in which case  the taylor series expansion of x^2 is x^2 - and
>so it is for any other polynomial  (terms above the second order term equal
>zero because higher order derivatives equal zero).
>
>However I still don't know the answer to the problem but I am more than
>happy to assume that x is a normally distributed random variable.
>
>Any other help will be appreciated.
>
>Regards Patrick