My Math Forum derive variance using binomial random variable

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 February 6th, 2017, 10:14 AM #1 Senior Member   Joined: Jan 2016 From: Blackpool Posts: 104 Thanks: 2 derive variance using binomial random variable Hi if it helps I have just proved that E(X) of a binomial random variable is N*theta where R~Bin(N,theta) However I am unsure how to start variance proof.
 February 6th, 2017, 10:30 AM #2 Senior Member     Joined: Sep 2015 From: USA Posts: 2,553 Thanks: 1403
 February 6th, 2017, 11:07 AM #3 Senior Member   Joined: Jan 2016 From: Blackpool Posts: 104 Thanks: 2 I've looked at lecture material and also google but I can't seem to find anything where variance of a binomial distribution is derived
February 6th, 2017, 11:30 AM   #4
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Joined: Sep 2015
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Quote:
 Originally Posted by Jaket1 I've looked at lecture material and also google but I can't seem to find anything where variance of a binomial distribution is derived
dude

i posted a link where it's derived....

click on the sentence "You should google a bit harder before asking"

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