birthday paradox

This is a discussion on birthday paradox within the A Brief History of Cprogramming.com forums, part of the Community Boards category; idelovski, April 25...

  1. #31
    Registered User
    Join Date
    Mar 2007
    Posts
    142
    idelovski, April 25

  2. #32
    Captain Crash brewbuck's Avatar
    Join Date
    Mar 2007
    Location
    Portland, OR
    Posts
    7,160
    Quote Originally Posted by idelovski View Post
    idelovski, April 25
    Another indirect match -- my wife's birthday.

    (Actually, come to think of it, ever girl I've ever dated was born on that date. Spooky. But it makes it easier to remember the date )

  3. #33
    Woof, woof! zacs7's Avatar
    Join Date
    Mar 2007
    Location
    Australia
    Posts
    3,459
    > But it makes it easier to remember the date
    Associative compression

    Always thought you were a computer

  4. #34
    Registered User
    Join Date
    Mar 2007
    Posts
    142
    Quote Originally Posted by brewbuck View Post
    (Actually, come to think of it, ever girl I've ever dated was born on that date. Spooky. But it makes it easier to remember the date )
    So you dated Renée Zellweger? How was she?
    Last edited by idelovski; 06-13-2008 at 08:04 PM. Reason: Supplied a link!

  5. #35
    Frequently Quite Prolix dwks's Avatar
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    8,046
    Assuming Jackie Chan's list in post #27 was correct, we now have:
    Code:
    1) Jackie Chan          April 7
    2) Prelude              November 11
    3) Neo1                 October 11
    4) brewbuck             February 7
    5) ahluka               June 7
    6) ping                 December 15
    7) anon                 October 25
    8) indigo0086           June 13
    9) Mario F.             August 23
    10) BMJ                 May 29
    11) maxorator           March 25
    12) SlyMaelstrom        August 10
    13) abh!shek            January 10
    14) P4R4N01D            February 28
    15) QuantumPete         August 11
    16) mike_g              October 14
    17) zacs7               October 17
    18) foxman              October 15
    19) dra                 September 28
    20) idelovski           April 25
    Only three more to go and then we can buy into the theory that those sharing birthdays just aren't posting.
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


    Other boards: DaniWeb, TPS
    Unofficial Wiki FAQ: cpwiki.sf.net

    My website: http://dwks.theprogrammingsite.com/
    Projects: codeform, xuni, atlantis, nort, etc.

  6. #36
    Devil's Advocate SlyMaelstrom's Avatar
    Join Date
    May 2004
    Location
    Out of scope
    Posts
    4,062
    Or we can just buy into the theory that half the time... a 50% chance won't happen...
    Sent from my iPad®

  7. #37
    Frequently Quite Prolix dwks's Avatar
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    8,046
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


    Other boards: DaniWeb, TPS
    Unofficial Wiki FAQ: cpwiki.sf.net

    My website: http://dwks.theprogrammingsite.com/
    Projects: codeform, xuni, atlantis, nort, etc.

  8. #38
    Woof, woof! zacs7's Avatar
    Join Date
    Mar 2007
    Location
    Australia
    Posts
    3,459
    Ahh great, all you've done now is confused me for my statistics exam :s

  9. #39
    Captain Crash brewbuck's Avatar
    Join Date
    Mar 2007
    Location
    Portland, OR
    Posts
    7,160
    Quote Originally Posted by zacs7 View Post
    Ahh great, all you've done now is confused me for my statistics exam :s
    It is of course, random. The fact still remains that from a mathematical standpoint, the chance of a hit becomes greater than 0.5 when there are 23 or more people. This doesn't mean the hit will happen, but it becomes more and more likely.

    In other words, given an infinite set of sets of 23 people, approximately half of such sets (only approximate, because the actual halfway point is not an integral number of people, but a non-integral number of people is impossible) will contain at least one coincident birthday. But you shouldn't be that surprised if any GIVEN set does not contain a hit, any more than you should be surprised by flipping 8 heads in 10 flips.

    Now, if you had a set of 367 people and got no hits, you should be VERY surprised, since there are only 366 days in the year (worst case, counting leap years)

  10. #40
    Captain Crash brewbuck's Avatar
    Join Date
    Mar 2007
    Location
    Portland, OR
    Posts
    7,160
    Quote Originally Posted by idelovski View Post
    So you dated Renée Zellweger? How was she?
    Eh, she looks nice but isn't exactly my type... I only go for CS grads, preferably those who work at Intel and know all kinds of secrets they are under NDA not to tell me (eventually I married one)

  11. #41
    Ethernal Noob
    Join Date
    Nov 2001
    Posts
    1,901
    Quote Originally Posted by zacs7 View Post
    Ahh great, all you've done now is confused me for my statistics exam :s
    Hey, just had my stat exam wednsday, probably did well on it.

Page 3 of 3 FirstFirst 123
Popular pages Recent additions subscribe to a feed

Similar Threads

  1. my belated birthday...
    By doubleanti in forum A Brief History of Cprogramming.com
    Replies: 9
    Last Post: 12-13-2004, 06:10 AM
  2. Happy Birthday Prelude
    By Stack Overflow in forum A Brief History of Cprogramming.com
    Replies: 17
    Last Post: 11-11-2004, 07:23 PM
  3. Happy Birthday Govtcheez
    By sean in forum A Brief History of Cprogramming.com
    Replies: 8
    Last Post: 07-27-2004, 07:45 PM
  4. Replies: 6
    Last Post: 04-13-2004, 05:49 AM
  5. My birthday present to myself
    By Liger86 in forum A Brief History of Cprogramming.com
    Replies: 11
    Last Post: 01-25-2003, 08:49 PM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21