You are viewing an obsolete version of the DU website which is no longer supported by the Administrators. Visit The New DU.
Democratic Underground Latest Greatest Lobby Journals Search Options Help Login
Google

ONE IN 4.5 BILLION? IT'S ACTUALLY MUCH, MUCH WORSE THAN THAT. [View All]

Printer-friendly format Printer-friendly format
Printer-friendly format Email this thread to a friend
Printer-friendly format Bookmark this thread
This topic is archived.
Home » Discuss » Topic Forums » Election Reform Donate to DU
TruthIsAll Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Nov-28-04 09:56 PM
Original message
ONE IN 4.5 BILLION? IT'S ACTUALLY MUCH, MUCH WORSE THAN THAT.
Advertisements [?]
Edited on Sun Nov-28-04 10:42 PM by TruthIsAll
In the interest of mathematical accuracy, I must confess: My original analysis was actually too conservative when I estimated that the odds were 1 in 4.5 billion that 16 of 51 states would move beyond the Exit Poll Margin of Error to the actual Bush vote.

In the calculation, I used the probability of 5% that a single state would deviate beyond the MOE as input to the Excel Binomial Distribution function. That was actually correct on its face – but it's the probability of a move beyond the MOE, regardless of whether the move is favorable to Bush OR Kerry.

In fact, what we really want is the probability that the vote would deviate beyond the MOE to Bush, not Kerry. This is exactly what happened. So that is why we must use 2.5% and NOT 5.0% as our input probability. We just split the probability in half, the half that would go to Bush..

So, what is the effect of this seemingly small, innocuous change on our final probability estimate? Well, it means that the probability these 16 deviations could be due to CHANCE alone becomes EVEN MORE REMOTE. And this is actually an understatement of BIBLICAL PROPORTIONS.

Get ready. Grab your chair. Hold your hat.

Here are the odds that 16 out of 51 states would move beyond the MOE in favor of Bush, again using the Binomial Distribution. But this time with .025 (rather than .05) as the probability that a given state would move beyond the MOE to Bush:

The probability P is: P =1-BINOMDIST(16,51,0.025,TRUE)

P = 0.0000000000004996%

The odds are 1/P or 1 out of 200.159 TRILLION that these changes could have occurred due to chance alone.

ONE out of 4.5 BILLION?
ONE out of 200 TRILLION?

There is NO practical difference.
But the second one is MATHEMATICALLY CORRECT.

Here are the odds for N states moving beyond the MOE in favor of Bush:

N The odds are 1 out of:
1- 3
2- 7
4- 113
6- 3,715
8- 223,016
10- 22,192,000
12- 3,432,782,579
14- 788,997,832,405

16- 200,159,983,438,689

That's right. You are seeing correctly. Don't laugh. Don't cry.
It's 1 out of 200 trillion.

Printer Friendly | Permalink |  | Top
 

Home » Discuss » Topic Forums » Election Reform Donate to DU

Powered by DCForum+ Version 1.1 Copyright 1997-2002 DCScripts.com
Software has been extensively modified by the DU administrators


Important Notices: By participating on this discussion board, visitors agree to abide by the rules outlined on our Rules page. Messages posted on the Democratic Underground Discussion Forums are the opinions of the individuals who post them, and do not necessarily represent the opinions of Democratic Underground, LLC.

Home  |  Discussion Forums  |  Journals |  Store  |  Donate

About DU  |  Contact Us  |  Privacy Policy

Got a message for Democratic Underground? Click here to send us a message.

© 2001 - 2011 Democratic Underground, LLC