Quote:
Originally Posted by mugatu668
Hmm this seems too simple though. It then asks me to find E(x^3) and E(x^10)
is this really so trivial that they all equal each other? maybe he is trying to drive home some point?
Yes, those are all the same theta. You know the definition of expected value right? You take each possible value multiplied by the probability that value occurs, and sum those together.
Perhaps his point is that all of the moments are theta, and that will allow you to get any moment of a binomial distribution as n*theta since any moment of a binomial will be a sum of the moments of bernoulli trials because the expected values add.
Last edited by BruceZ; 10-22-2012 at 01:19 AM.