Let’s discuss some facts about your birthdays.
What makes you, you? You’ve always probably considered your birthday a pretty unique trait in your personal life.
And that’s true. But at the same time, you also share that birthday with millions and millions of other people. So in a way, it’s not unique at all. One fun thing I like to do at parties is going around and collect data from all my friends, see if any of them.
Share the same birthday. One, because I’m a pretty fun guy and know how to party, but two, because it’s a fun way to test the birthday paradox. Observe.
What’s your birthdate? Suppose it’s 14 November. Will many more people also share your birthday i_e having the same birthday.
Pretty weird, huh? Here’s how this works. The birthday paradox refers to the likelihood of two people within a random group, sharing the same birthday. Given the fact that there are 366 possible birthdays,
Including February 29th. – Sup? – It doesn’t seem all that likely. But, in a room of 23 people, there’s more than a 50% chance that two of those people share the same birthday.
If that seems high, consider this. In a group of 23 people, there are 253 possible chances for a match. So, might not make sense to your brain, but that doesn’t matter, because you know, math.
Now we are going to test the Paradox. By the time we hit 27 people, there’s a 24.4% chance that two of them will have the same birthday. Are we going to be that lucky? I don’t know, let’s find out! We asked the first person. His birthday was January 30th, 1959. We saw more 4 people also with the same birthday. Hahh!
– I got a special treat for you guys. So there you go, here’s your lovely Halloween cake. Guys, thank you for…thank you for being born! So there you have it, 14 people, and we found two wonderful souls with the same birthday.
So the birthday paradox, it’s a real thing. So there you have it, fourteen people and we found a match. There’s only about a 28.05% chance of that happening,
And it only gets higher from there. If we’d talked to 65 people, it would’ve been about a 99% chance of finding of finding a match. Pretty crazy guys.
I guess you can probably blame that on my brother then. – Well, before we do that, I wanna know if these birth order studies carry any weight. So I got some siblings to play a game show.
Most social, okay fine. They used to tell me when I was three I would grab people at weddings and just dance with them out of nowhere. – Did that last week too.
No one guessed right. – Oh, okay. A study found which sibling tends to be a perfectionist? – I don’t think we even have to discuss this one. – Wanna say it all together?
So, we can see the studies are accurate. Our siblings, or our lack of siblings, they totally shape our lives. So maybe the majority of first born are all successful perfectionists, like me. But that doesn’t mean all oldest siblings are.
– January birthdays! Here, check this out. Suppose you were born in January. That would come just after the cut off date for some sports. So if you were 15 on January first, you would play for the 15-year-old team.
Even if you were turning 16 on, the second. Studies have shown that this age gap can give you an advantage because on average you’re bigger and stronger than the younger competition. This is called “the relative age effect.” September is the cutoff date for most schools
So if you’re born in September, theoretically, you should be the best at sports. Actually, hold on a second. Does being born in September make you better at sports? I’m here at Buzzfeed to find out.
What’s the highest sports team they ever played for. According to our study, most people quit after high school. But we actually found that there are three people here that played professional sports. And two out of those three people were born in October and November.
So, maybe your birthday does have an effect. But we don’t know for sure. So what if you’re born in like July. Well, it’s not really an exact science. I went to the junior Olympics throughout high school.
For fencing. My birthday is August 10th, 1995. – Look, if you wanna play sports, then play sports! It doesn’t matter if you’re smaller than the competition, you can’t let your birthday hold you back!
So our birthdays shape us in a lot of ways that we never even thought. But our birth date doesn’t define who we are. So really, it’s just an excuse to hang out with friends and have a good time. So enjoy it.
So, in a single room of 23 people, there’s more than a 50% chance that two of those people share the same birthday..!!