I have just sat a paper that a failed big time!
Because on on question I couldn't get started on and it was worth 21 marks.
So could some one put my mind at rest as to the answer to this question.
If X1,....Xi is distributed poison with E[Xi]=lamda then if
lamda(estimate)=1/n * sum[Xi]
What is the expected value and variance of lamda(estimate)
Thanks in advance