# The birthday paradox science project. What Is the Birthday Paradox? 2022-10-16

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The birthday paradox is a statistical phenomenon that states that in a group of 23 or more people, there is a 50% chance that two people will have the same birthday. This may seem counterintuitive at first, as the probability of any two specific people having the same birthday is only 1/365, or 0.27%. However, as the size of the group increases, the probability of at least two people having the same birthday also increases.

To demonstrate the birthday paradox, you can conduct a science project by gathering a group of people and having them each write down their birthdays. You can then calculate the probability of at least two people having the same birthday by dividing the number of pairs of people by the total number of possible pairs. For example, if you have a group of 23 people, there are 253 possible pairs of people. If at least two of those pairs have the same birthday, then the probability of at least two people having the same birthday is 1.

To make the project more interactive and engaging, you can also have the participants guess the probability of at least two people having the same birthday before calculating the actual probability. This can be done through a simple survey or by asking participants to write down their guesses on a piece of paper.

In addition to calculating the probability, you can also conduct experiments to test the birthday paradox. For example, you can have the participants close their eyes and randomly select a birthday from a hat or a deck of cards representing the 365 days of the year. You can then count the number of pairs with the same birthday and compare it to the probability calculated earlier.

The birthday paradox is a fascinating topic that can be explored through various experiments and activities. It not only demonstrates the principles of probability and statistics, but it also challenges our intuition about the likelihood of certain events occurring. Conducting a science project on the birthday paradox can be a fun and engaging way to learn about this phenomenon and to understand the underlying principles behind it.

## What is the birthday paradox?

How often do you find a shared birthday among the 23 people? Group two had one set that had the same birthday. The number of possible pairings increases exponentially with group size. If you use a group of 366 people the greatest number of days a year can have the odds that two people have the same birthday are 100% excluding February 29 leap year birthdays , but what do you think the odds are in a group of 60 or 75 people? But first, let me convince you it happens. We can calculate the product of the numbers between 365 - N - 1 and 365 by dividing N! Dangers Of Tradition In Shirley Jackson's The Lottery 1269 Words 6 Pages A tradition or idea that is followed and not questioned by some could potentially be dangerous or illogical. Due to probability, sometimes an event is more likely to occur than we believe it to, especially when our own viewpoint affects how we analyze a situation. The above question was simple.

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Note: This information can easily be found on the internet. People turn one year older ever year so we celebrate it when you turn older. As a result, the probability of a shared birthday increases much faster than expected. Everybody grown men of a household goes to this black box and they select a piece of paper. Let's get an approximate solution by pretending birthday comparisons are like coin flips. During the late 1930s and 1940s, the citizens and the government of the United States were increasingly paranoid of a communist uprising, and the presence of Soviet spies. Well, the first person has 22 comparisons to make, but the second person was already compared to the first person, so there are only 21 comparisons to make.

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## Probability and the Birthday Paradox

What is the probability that two persons among n have same birthday? Charles has visited every continent on Earth, drinking rancid yak butter tea in Lhasa, snorkeling with sea lions in the Galapagos and even climbing an iceberg in Antarctica. There's no real experimentation involved where you are changing an independent variable to see how the dependent variable will be affected. . When comparing one person's birthday to another, in 364 out of 365 scenarios they won't match. If you add up all possible comparisons 22 + 21 + 20 + 19 + … +1 the sum is 253 comparisons, or combinations. However, the numbers should still be pretty close. If Person A and Person B match, and Person B and C match, we know that A and C must match also.

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## What Is the Birthday Paradox?

In March none of the eleven groups had the same birthday. To make our lives easier, 0! But people would really give us a chance of a shared birthday. Due to probability, sometimes an event is more likely to occur than we believe it to. Well, there is no magic in it. Persons from first to last can get birthdays in following order for all birthdays to be distinct: The first person can have any birthday among 365 The second person should have a birthday which is not same as first person The third person should have a birthday which is not same as first two persons.

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P Same can be easily evaluated in terms of P different where P different is the probability that all of them have different birthday. In January none of the eleven groups had the same birthday. Group four had one set that had the same birthday. Group eight had one set that had the same birthday. He found out that no one was born on February 29, but people's birthdays are equally distributed over the other 365 days of the year the birthday paradox.

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Does it mean that seconds are related to faculty? Hint: Check out the resources in the Bibliography below. I'm sorry to say, but I agree with your teacher. My birthday is November 15th. But I still check out the interactive example just to make sure. Thus, the total possibilities can be calculated by multiplying 365x365x365.

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The third person then has 20 comparisons, the fourth person has 19 and so on. It shows that many people can have the same birthday. It may be 1 match, or 2, or 20, but somebody matched, which is what we need to find. My project is about birthdays and this is about birth and coming into the world. If you add up all possible comparisons 22 + 21 + 20 + 19. In this experiment, you will evaluate the mathematics behind the birthday paradox and determine whether it holds true in a real world situation. In this case, if you survey a random group of just 23 people there is actually about a 50—50 chance that two of them will have the same birthday.

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