can someone please explain how the last line is arrived at.
- Thread starter GildedAge
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Please redo the derivation using pencil/paper - and I am sure you'll see how it is derived. Exactly where are you getting lost? Which term does not make sense?
Steven G
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I visually noticed (no math at all) that the a's on the left suddenly became (b-1)'s on the right. Everything else stayed exactly the same except for a starting at a and b starting at 1.
Hmm, it seems to me that maybe they are saying that a=b-1.
Now for a to equal 0, b must be 1. So yes, if a starts with 0, then b starts at 1
Hmm, it seems to me that maybe they are saying that a=b-1.
Now for a to equal 0, b must be 1. So yes, if a starts with 0, then b starts at 1
I'm confused with how they concluded that mean of Y is λ(second series) and thus the mean of Y is λ.
Never mind I found the answer. Thanks everyone.
BigBeachBanana
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Perhaps you'll like this explanation more. They start out similar but are different in the end.
Mean of the Poisson distribution
The Book of Statistical Proofs – a centralized, open and collaboratively edited archive of statistical theorems for the computational sciences
statproofbook.github.io