Question

If the standard deviation of possion variable is 2 then mean is________​

Answer 1

Explanation:

Calculating the Variance

To calculate the mean of a Poisson distribution, we use this distribution's moment generating function. We see that: M( t ) = E[etX] = Σ etXf( x) = ΣetX λx e-λ)/x! ... We then use the fact that M'(0) = λ to calculate the variance. Var(X) = λ2 + λ – (λ)2 = λ.0

Answer 2

Answer:

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