Expected value of binomial distribution | Probability and Statistics | Khan Academy
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Video Rating: / 5
too complicated
"My iPod wants to sync" Hilarious.
Hey Sal, thank you for your great efforts! I am sure you won't check it on your own, but in 13:13 It should be Sum from a=0 to b+1. Bcoz n-1=b so n=b+!
after the change of indexes to a , b , it remains to show that the summation (15:00) = 1. this is easy to see by noting that this summation is the binomial expansion of (p + (1-p))^b ; ie 1^b
12: 32 – n-k should be b-a and not a-b
hey anyone wanna explain to me how i would put this equation into a calculator i know how to format it but i dont know how to solve. the thing that makes the least sense is the (n choose k)
This is an awesome video! Dear video maker, you are a very talented teacher! 🙂
Marvellous "Proof".
Hey Guys, help me out here! If you ask me the probability of making one shot, for me I would say p=30%.
While saying this, I am actually providing an estimate that I'll be able to make 3 out of 10 shots for sure (means, P(X=3) given n=10 is 100%)
But then using same numbers n=10 and p=3 I calculate the binomial probability of making 3 shots out of 10 and it is 26.68%!
a wonderful proof!
why 1?
I couldn't understand
can anyone explain why p^k= p(p^k-1)?
A great work which really helps me to solve my assignment about random walk.
Got a much clear picture of the mathematical formula from this video.
his handwriting thou…
Great job, well done…
Holy shieeet thank you Khan! You're a fookin genius, thank youu =)
Thank you man, you're a fucking genious
"im talking about basketball not basket weaving.." LOL. And here I thought you were talking about probability of weaving a basket after doing shots 😛