Birthday Grapher
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Discover the Birthday Paradox.   Free
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  • Birthday Grapher has been discontinued
  • Developer
    Brian Flanagan
Birthday Grapher helps users discover the Birthday Paradox. Like many people, when I was first introduced probability's infamous "Birthday Paradox" I was in strong disbelief. I saw the formula and accepted it, but never really got it.

Recently I decided to convince myself of the validity of the paradox through the creation of a simple computer program. What this program does is takes a test-pool (or what I call a "room") and for each "person" in the "room" picks a number from 1 to 365. Then it checks to see if there are any duplicate numbers and returns "1" if there are and "0" if
What's New
Version 1.3:
  • Fixed minor memory issues.
Requirements
PPC, Mac OS X 10.3 or later



MacUpdate - Birthday Grapher



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Birthday Grapher User Discussion (Write a Review)
ver. 1.x:
Your rating: Now say why...
Overall:

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burypromote

+4
Nuclear Nova Software commented on 15 Dec 2005
Cool program, Its amazing how with only 23 people theres a 50% chance someone shares a birthday
[Version 1.1]


burypromote
mac_man had trouble on 22 Dec 2005
you say it runs on 10.3+, but i have 10.3.9, and it crashes...
[Version 1.2]


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Downloads:3,910
Version Downloads:2,505
Type:Education : Mathematics
License:Free
Date:21 Jan 2006
Platform:PPC 32 / OS X
Price:Free0.00
Overall (Version 1.x):
Features:
Ease of Use:
Value:
Stability:
Displaying 1-1 of 1
Displaying 1-1 of 1
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Birthday Grapher helps users discover the Birthday Paradox. Like many people, when I was first introduced probability's infamous "Birthday Paradox" I was in strong disbelief. I saw the formula and accepted it, but never really got it.

Recently I decided to convince myself of the validity of the paradox through the creation of a simple computer program. What this program does is takes a test-pool (or what I call a "room") and for each "person" in the "room" picks a number from 1 to 365. Then it checks to see if there are any duplicate numbers and returns "1" if there are and "0" if there aren't. Then it repeats this process a user specified number of times until it finally averages all of the ones and zeros together to produce a probability.

For the fun of it, I decided to have the program graph whole ranges of room-sizes to show the really unintuitive behavior of this problem.This program doesn't do much, but it does what it says it will pretty well. It's worth taking a look at.


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