Chi-square distribution introduction | Probability and Statistics | Khan Academy



First
By the 18th century, the term "statistics" designated the systematic collection of demographic and economic data by states.
Second
The term "mathematical statistics" designates the mathematical theories of probability and statistical inference, which are used in statistical practice.
Third
Blaise Pascal, an early pioneer on the mathematics of probability.



Chi-square distribution introduction | Probability and Statistics | Khan Academy



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Karl Pearson was a founder of mathematical statistics.


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About: Chi-square distribution introduction | Probability and Statistics | Khan Academy


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Chi-square distribution introduction | Probability and Statistics | Khan Academy

13 years later and here I am, finally my turn to watch this for an exam 🎉
The key in teaching stats is to use examples and not just terms so instead of saying variable X it would be better if u did indeed use a variable like weight, height, or anything else so we can follow
What's the degree of freedom?
Still watching it in 2023. He helped everyone
Coming back after 10 years. Thanks Sal!
Terrible explanation. Usually your videos are awesome but this sounds like drunk incoherent rambling
Thank you so much! This is THE video that really taught me the concept of Chi squared distribution.
Thank you for the nice video :D This video is really helpful!!
12 years later and still useful!! Thank you so much
After 11 year
Why do chi-squared distribution and chi-squared test have different formulas? Please answer, I'm going to have a presentation tomorrow 🙏🏿
Great video!!! just wanted to understand why do we square X1 and X2?
I am pretty new to Statistics, what is the use of a chi-square distribution, based on what I have seen a question could be: What is the chance that it is under this value or is this chi-square distributed.
This teacher is really confused
When I first see the of chi-square in English I thought was something chinese pphrase
Thank you
Khan is so smart.
At 04:45 please explain how a probability distribution sample has a probability of greater than 1 in the chi square curve for k=1?
Does chi-squared distribution formula is E(X)=k, V(X)=2k.? Correct me if this wrong.
Thanks a lot


What is statistics?
Statistics is a mathematical body of science that pertains to the collection, analysis, interpretation or explanation, and presentation of data, or as a branch of mathematics.