Happy Birthday

[OB..]

I have just noticed that Bill Beaumont and Martin Johnson both have birthdays today.

 

[Dickie E]

... and Yuri Gagarin. What are the chances?

 

[Phil E]

... and Yuri Gagarin. What are the chances?

Cosmic!

 

[Camquin]

Apparently it happens every year.

There have been 128 England Captains - so it was almost inevitable that two would share a birthday.
There have been 13 England Grand Slams. The chance that two people from 13 sharing a birthday is only about 20%.

The chance that the pair share a birthday with Yuri Gagarin is about 1 in 365, but the chance they share it with someone well known is unity.

See https://en.wikipedia.org/wiki/Birthday_problem

 

[Lee Lifeson-Peart]

It's my son's birthday today.

 

[Camquin]

And I thought Bill Beaumont is a proud Lancastrian - so your either Martin Johnson's father or Yuri Gagarin's

 

[didds]

Apparently it happens every year.

There have been 128 England Captains - so it was almost inevitable that two would share a birthday.
There have been 13 England Grand Slams. The chance that two people from 13 sharing a birthday is only about 20%.

The chance that the pair share a birthday with Yuri Gagarin is about 1 in 365, but the chance they share it with someone well known is unity.

See https://en.wikipedia.org/wiki/Birthday_problem

Very early in my statistics degree we were shown that its statistically likely that as few as less than fprty are needed for there to be two people sharing a birthday. In our first year starts class of around fifty, we had five pairs (I was in one of them)
Didds

 

[didds]

https://en.m.wikipedia.org/wiki/Birthday_problem

Think our lecturer was using 95% probability iirc.

Didds

 

[OB..]

Very early in my statistics degree we were shown that its statistically likely that as few as less than fprty are needed for there to be two people sharing a birthday. In our first year starts class of around fifty, we had five pairs (I was in one of them)
Didds

For a 50% chance of of a pair you only need 23 people.

What matters, of course, is not the number of people, but the number of pairs. Any crib player can tell you that 2 equal cards = 1 pair, 3 cards = 3 pairs, and 4 cards = 6 pairs

 

[didds]

yes indeed OB. "statistically" likely seemed to be 90% in this case in my 1st year lecture. Interestingly by the time I was in my 3rd year, and doing applied stats with real world data we needed to use 95% !



didds