Find the standard deviation of the Poisson random variable. Round to three decimal places.
-The number of calls received by a car towing service in an hour has a Poisson distribution with parameter $\lambda$ = 1.860. Let X denote the number of calls received by the service in a randomly selected
Hour. Find the standard deviation of X.
A)0.930
B)1.860
C)1.364
D)3.460

Question

Find the standard deviation of the Poisson random variable. Round to three decimal places.
-The number of calls received by a car towing service in an hour has a Poisson distribution with parameter $\lambda$ = 1.860. Let X denote the number of calls received by the service in a randomly selected
Hour. Find the standard deviation of X. 
A)0.930
B)1.860
C)1.364
D)3.460

Quizplus · Accepted Answer

The standard deviation of a Poisson distribution is the square root of its mean ($\lambda$), which in this case is $\sqrt{1.860} \approx 1.364$.

Find the Standard Deviation of the Poisson Random Variable λ\lambdaλ = 1860 Let X Denote the Number of Calls Received by to Three

Find the Standard Deviation of the Poisson Random Variable $\lambda$ = 1860 Let X Denote the Number of Calls Received by to Three