Find the Standard Deviation of the Poisson Random Variable $\lambda = 4.800$

Find the standard deviation of the Poisson random variable. Round to three decimal places.
-In one town, the number of burglaries in a week has a Poisson distribution with parameter $\lambda = 4.800$ . Let $\mathrm { X }$ denote the number of burglaries in the town in a randomly selected week. Find the standard deviation of X.

A) $23.040$
B) $2.191$
C) $4.800$
D) $2.400$

Correct Answer:

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