MagicMatt
Brewmathemagician
I learned about the Birthday Paradox in college (MATH 402 - Advanced Mathematical Statistics and Probability), and was recently discussing it with a coworker who didn't believe me. It was hard to confirm at work (our team is only about 15 people), so I want to put it to the test here.
For those who aren't familiar, the Birthday Paradox says that if you have a random group of 23 people, there is > 50% chance that 2 of these people share a birthday. Seems crazy at first, right? Check out the next post for details on the math.
To participate, it's real simple: Post your birth month & day (no year). Except if you were born on Leap Day. Sorry, you don't get to play.
We'll see how long it takes to get a repeating day. I'll take each consecutive group of 23 unique posters and note them here.
1st Duplicate: 16 people (03/16)
2nd Duplicate: 34 people (03/08)
3rd Duplicate: 39 people (01/05)
4th Duplicate: 45 people (02/06)
5th Duplicate: 53 people (08/15)
6th Duplicate: 56 people (10/30)
7th Duplicate: 58 people (08/13)
8th Duplicate: 60 people (06/03)
9th Duplicate: 62 people (12/11)
10th Duplicate: 65 people (08/16)
All 12 Months: 67 people (May finally accounted for)
11th Duplicate: 71 people (02/23)
12th Duplicate: 73 people (04/22)
13th Duplicate: 78 people (04/29)
1st Triplicate: 82 people (02/06)
14th Duplicate: 83 people (09/11)
15th Duplicate: 88 people (12/31)
16th Duplicate: 89 people (03/02)
TALLY
For those who aren't familiar, the Birthday Paradox says that if you have a random group of 23 people, there is > 50% chance that 2 of these people share a birthday. Seems crazy at first, right? Check out the next post for details on the math.
To participate, it's real simple: Post your birth month & day (no year). Except if you were born on Leap Day. Sorry, you don't get to play.
We'll see how long it takes to get a repeating day. I'll take each consecutive group of 23 unique posters and note them here.
1st Duplicate: 16 people (03/16)
2nd Duplicate: 34 people (03/08)
3rd Duplicate: 39 people (01/05)
4th Duplicate: 45 people (02/06)
5th Duplicate: 53 people (08/15)
6th Duplicate: 56 people (10/30)
7th Duplicate: 58 people (08/13)
8th Duplicate: 60 people (06/03)
9th Duplicate: 62 people (12/11)
10th Duplicate: 65 people (08/16)
All 12 Months: 67 people (May finally accounted for)
11th Duplicate: 71 people (02/23)
12th Duplicate: 73 people (04/22)
13th Duplicate: 78 people (04/29)
1st Triplicate: 82 people (02/06)
14th Duplicate: 83 people (09/11)
15th Duplicate: 88 people (12/31)
16th Duplicate: 89 people (03/02)
TALLY
- 01/01
- 01/05
- 01/05
- 01/09
- 01/13
- 01/22
- 01/23
- 01/29
- 01/31
- 02/03
- 02/06
- 02/06
- 02/06
- 02/22
- 02/23
- 02/23
- 02/26
- 02/29
- 03/02
- 03/02
- 03/04
- 03/08
- 03/08
- 03/16
- 03/16
- 03/21
- 04/01
- 04/08
- 04/09
- 04/11
- 04/22
- 04/22
- 04/24
- 04/29
- 04/29
- 04/30
- 05/05
- 05/19
- 06/01
- 06/03
- 06/03
- 06/07
- 06/12
- 06/21
- 06/26
- 06/29
- 07/07
- 07/28
- 08/03
- 08/08
- 08/13
- 08/13
- 08/15
- 08/15
- 08/16
- 08/16
- 08/18
- 08/24
- 08/28
- 09/01
- 09/11
- 09/11
- 09/15
- 10/05
- 10/11
- 10/12
- 10/16
- 10/19
- 10/24
- 10/29
- 10/30
- 10/30
- 10/31
- 11/01
- 11/05
- 11/06
- 11/08
- 11/10
- 11/17
- 11/23
- 11/24
- 11/27
- 11/30
- 12/11
- 12/11
- 12/13
- 12/19
- 12/25
- 12/31
- 12/31