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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: 2,430 Thanks: 1315  
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 
Senior Member Joined: Sep 2015 From: USA Posts: 2,430 Thanks: 1315  

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binomial, derive, random, variable, variance 
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