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Last edited by Sam1985; Dec 9th 2009 at 11:13 PM.
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I think the state space is {0 ,1,2,3......} because this is the number of trials needed to get the first success? P{Xn=1} = p P{Xn=0} = q i think again?? and for c is it something to do with teh sum of between 1 and 0 nCn P^x(1-p)1-x?
Originally Posted by Sam1985 Hi people I only recently discovered this forum and I think its a great idea. I am stuck on this question any help would me much appreciated: Consider asequence of bernoulli trials with probability of success p. Let random variable X be the number of trials needed to get the 1st success. Is the state space of random variable X [success,failure]? What would be the probability distribution of X? What's the mean value of X? Research the geometric distribution.
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