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- Newsgroups: alt.folklore.science
- Path: sparky!uunet!mdisea!gix
- From: gix@mdd.comm.mot.com (Brian Gix)
- Subject: Re: More Monty Hall
- Message-ID: <1992Dec23.000651.8691@mdd.comm.mot.com>
- Sender: news@mdd.comm.mot.com
- Organization: Motorola, Mobile Data Division - Seattle, WA
- References: <1992Dec21.214559.22343@berlioz.nsc.com> <1992Dec21.230241.19209@colorado.edu> <1992Dec22.185741.9823@berlioz.nsc.com>
- Distribution: usa
- Date: Wed, 23 Dec 1992 00:06:51 GMT
- Lines: 42
-
- In article <1992Dec22.185741.9823@berlioz.nsc.com> worden@bouncer.nsc.com (Dennis Worden) writes:
- >
- >The fact that you now have an open door with a goat behind it does not
- >change the fact that you have 2 door and 1 prize. The opening of the
- >third door only tells you that the prize is not behind that door, it does
- >not add any information as to where the prize really is. Or put it another
- >way, if you consider this new information on the same puzzle, why do you
- >freeze the probability of the original guess at 33%? To freeze the original
- >probabilities at their "pre-new-information" levels means that your are not
- >using that new information. The new information would apply equally to all
- >doors that are left, and adjusts the probability to 50%. The original
- >assumption of 33% chance per door was based upon 3 closed doors. The new
- >question is which of 2 closed doors has the prize.
- >
-
- Dennis, you are completely ignoring one enormous fact. Monty WILL NOT choose the
- door to open that you picked in the 1st place. garenteed. He will Always choose
- a door with a goat, but 2 times out of 3, he is FORCED to open 1 particular door.
-
- If you accept that to begin with, your 1st choice will be wrong 2/3 of the time,
- Monty is FORCED 2/3 of the time to choose the OTHER goat leaving the car behind
- the OTHER of the 2 doors you didn't choose.
-
- It's only 1/3 of the time, when you initially choose the car door, that Monty has
- the frredom of choice on the remaining doors. It's only that 1/3 of the time that
- switching loses.
-
- It's only 50-50 if after Monty opens a door with a goat, you are blind-folded, spun
- around 50 times, and have the rooms re-arranged, and you don't know which door you
- originally picked.
-
- >
- >--
- >Dennis Worden, not representing $ When the TEAM succeeds, you succeed,
- >anybody, not even himself, in $ but when the Team fails, you're FIRED.
- >any way shape or form. $ Don't EMAIL me at worden@berlioz.nsc.com
-
-
- --
- --Brian Gix Motorola
- gix@mdd.comm.mot.com Mobile Data Division
- (206) 487-5894 #include <disclaimer.h>
-