User talk:Gerald Tros
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Hello, Gerald Tros, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:
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signatures[edit]
Hello. Please note that you should sign your contributions to talk pages, but NOT you contributions to articles. When you contribute to an article, you are identified in the article's edit history. Michael Hardy 01:20, 17 April 2007 (UTC)
- Thank you, Michael. It was my first contribution. I now understand where the tildas need to go. Here: Gerald Tros 01:32, 16 May 2007 (UTC)
Derivation of Mean[edit]
When you rename m=n-1 and s=k-1 it seems to me that the limit of the sum changes to s=0 (lower bound) and m+1 (upper bound) so the ensuing sum is a sum over a complete binomial pmf plus an additional term. You've dropped a term in you sigma expression.
Please tell me why this is permissible since I have yet to see a valid derivation of this mean using algebra only.