If S.D. of a poisson variate is 2, then obtain its mean.

1.	If S.D. of a poisson variate is 2, then obtain its mean.
Answer» SD = √(Var(x) 2 = √λ ∴ λ = 4.; ∴ Mean = 4.

Answer»

SD = √(Var(x)

2 = √λ

∴ λ = 4.;

∴ Mean = 4.

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