'Suppose that X is a Poisson random variable such that P(X = 1) = P(X = 2) What is the mean of X? (b) What is the expectation of X2?'
Added by Amber L.
Step 1
Since P(X = 1) = P(X = 2), we can write it as λe^(-λ)/1! = λe^(-λ)/2!, where λ is the mean of X. Solving this equation, we get λ = 2. Show more…
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