🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: sci.math.stat
Article #612

expected value of inverse sample covariance?

#612
From: Behzad M Shahshahani
Date: Thu, 01 Oct 1992 20:19
10 lines
815 bytes
I have been trying to find the expected value of inverse of S, the
unbiased covariance estimte. Does anyone know what this expected value is, 
or any references??
                                                         T
E{inverse(S)} = ??, where S=1/n-1 (sum((xi-xbar)(xi-xbar) )

Thanks in advance.

-Behzad Shahshahani
Technical Details
Message-ID: <1992Oct1.201906.14311@noose.ecn.purdue.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!spool.mu.edu!news.nd.edu!mentor.cc.purdue.edu!noose.ecn.purdue.edu!ec.ecn.purdue.edu!behzad

Show Full Headers
Complete Article Headers
Newsgroups: sci.math.stat
Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!spool.mu.edu!news.nd.edu!mentor.cc.purdue.edu!noose.ecn.purdue.edu!ec.ecn.purdue.edu!behzad
From: behzad@ec.ecn.purdue.edu (Behzad M Shahshahani)
Subject: expected value of inverse sample covariance?
Message-ID: <1992Oct1.201906.14311@noose.ecn.purdue.edu>
Sender: B.M.Shahshahani
Organization: Purdue University Engineering Computer Network
Date: Thu, 1 Oct 1992 20:19:06 GMT
Lines: 10