[R] MLE for lambda of Poisson distribution using fitdistr

[ankush2kn at yahoo.com]

Hi,

I am using the fitdistr of MASS to get the MLE for the lambda of a Poisson distribution.
When i run the fitdistr command, i get an output that looks like - 

     lambda
     3.750000
     (0.03343)

Couple of questions - 
1. is the MLE 0.03343 for the lambda of the given distribution then?
2. How would I calculate the variance of the MLE for the lambda?

Thanks much!
Ankush

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