alleryStart learning →For a Poisson(λ) random variable, the mean equals the variance and both equal
Ae^λ
Bλ
Cλ²
D1/λ
Answer & Solution
Correct answer: B. λ
Poisson(λ): E[X] = Var[X] = λ.
This 'mean equals variance' property is a signature used to test whether count data is Poisson.
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