Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Foo Off-Topic chit chat with no general subject.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-05-09, 08:53 PM   #1
phantomcow2
la vache fantôme
Thread Starter
 
phantomcow2's Avatar
 
Join Date: Aug 2004
Location: NH
Bikes:
Posts: 6,266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Statistics -- blue estimator?

Some point estimator, mu hat, is given by the following:
mu hat = .2X1 + 2.5X2 - X3 - .7X4

There are 4 samples (Xi). I am asked to determine whether this mu hat is a BLUE estimator of mu.

I can prove that mu hat is unbiased by taking the expected value of the expression, and I can show that mu hat is not a linear estimator. Since it is not even a linear estimator, I would expect that this is not a BLUE estimator. But I feel like I get in trouble when I make assumptions, so I thought I'd ask if somebody could shed some light here. Thanks.
__________________
C://dos
C://dos.run
run.dos.run

Last edited by phantomcow2; 09-05-09 at 10:40 PM.
phantomcow2 is offline   Reply With Quote
Old 09-05-09, 10:40 PM   #2
phantomcow2
la vache fantôme
Thread Starter
 
phantomcow2's Avatar
 
Join Date: Aug 2004
Location: NH
Bikes:
Posts: 6,266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
nevermind this. I realize it is a linear estimator after all.
__________________
C://dos
C://dos.run
run.dos.run
phantomcow2 is offline   Reply With Quote
Old 09-05-09, 10:56 PM   #3
Ted Danson
Senior Member
 
Ted Danson's Avatar
 
Join Date: Jul 2006
Location: Wisconsin
Bikes:
Posts: 377
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Whats a mu hat?
__________________
Merton Enthusiast
Ted Danson is offline   Reply With Quote
Old 09-05-09, 11:15 PM   #4
Luddite
Mrs. DataJunkie
 
Luddite's Avatar
 
Join Date: Jun 2009
Location: Vancouver, BC
Bikes: Asama "Luddite" and Kuwahara MTB from the 90s
Posts: 1,529
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Holy gods, is this what statistics is like? I'm so fragged!
Luddite is offline   Reply With Quote
Old 09-06-09, 11:05 AM   #5
RUOkie
Scarlet Knight
 
RUOkie's Avatar
 
Join Date: May 2009
Location: In a Haggard Song
Bikes: 2009 ORBEA Onix Rival. 2012 Felt Breed, 1999 Raleigh 500
Posts: 10,781
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 200 Post(s)
http://www.youtube.com/watch?v=N4Bd1TaSIJA
RUOkie is offline   Reply With Quote
Old 09-06-09, 11:18 AM   #6
Allen
Senior Member
 
Join Date: Sep 2005
Bikes:
Posts: 4,751
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Ted Danson View Post
Whats a mu hat?


Though I recommend Poodle Hat.
Allen is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 11:18 AM.