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Statistics: Expected Values

Suppose X is a Poisson random variable with parameter lamna, find Var(X).

So, lambda is the parameter..Therefore, lambda is the variance.. (lambda = mean = variance with the Poisson Distribution).λ = E(X) = Var(X)"The positive real number λ is equal to the expected value of X and also to its variance." http://en.wikipedia.org/wiki/Poisson_distributionhttps://proofwiki.org/wiki/Variance_of_Poisson_Distribution"The interesting thing about the Poisson distribution is that its expectation and its variance are both equal to its parameter λ.""The expected value of a Poisson-distributed random variable is equal to λ and so is its variance."
Steve R.
07 October 2014
13 September 2017
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