Question is #3 in the attached pic. Please help!
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Use the binomial theorem If you differentiate and let t=1, you will obtain E(X)=np. Differentiate a second time and let t=1 and you will find This should work well with the Poisson too.
Thank you for the response. I have been trying to figure out what you mean about the differentiation. I don't know what to differentiate. Could you ne a little more specific? Thank you
differeniate wrt t, then let t=1 it says that in the problem I'm really busy grading exams this weekend plus I have a galley proof to review
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