Date:         Sun, 30 Mar 2008 17:27:27 +0200
Reply-To:     Stefan Pohl <stefan.pohl@ISH.DE>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Stefan Pohl <stefan.pohl@ISH.DE>
Subject:      Weight problem
Content-Type: text/plain; charset="us-ascii"

Dear sas-list,

I want to express Sqrt(sum_1^n {a_i}^2) / sum_1^n {a_i} as a function of
sum_1^n {a_i}.

In the special case if a_i=1 we get: Sqrt(sum_1^n {a_i}^2) / sum_1^n {a_i} =
1 / sqrt(n).

But in the general case?

Any suggestions?

Best, Stefan.