If the standard deviation for a Poisson distribution is known to be 3, the expected value of that Poison distribution is:
A) 3
B) about 1.73
C) 9
D) Can't be determined without more information.

Question

Quizplus · Accepted Answer

For a Poisson distribution, the standard deviation is the square root of the expected value (λ). If the standard deviation is 3, then λ = 3^2 = 9.

If the Standard Deviation for a Poisson Distribution Is Known