Hi, is this list only related to R issues or it has a broader context regarding questions and discussions about statistics. Is there any other email list or forum for that? For example, I have a question regarding variance. It is defined as: variance = sum(sq(Xi-mean)) / (N-1) and I never understood why not define it as variance = sum(absolute(Xi-mean) / (N-1) I read somewhere that this cannot be differentiated on 0. But, why is it necessary to be able to differentiate it? Thanks. [[alternative HTML version deleted]]
it's also not unbiased.
-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Y G
Sent: Monday, April 30, 2007 8:15 AM
To: r-help at stat.math.ethz.ch
Subject: [R] general question about use of list
Hi,
is this list only related to R issues or it has a broader context
regarding questions and discussions about statistics. Is there any other
email list or forum for that? For example, I have a question regarding
variance. It is defined as:
variance = sum(sq(Xi-mean)) / (N-1)
and I never understood why not define it as variance sum(absolute(Xi-mean) /
(N-1)
I read somewhere that this cannot be differentiated on 0. But, why is it
necessary to be able to differentiate it?
Thanks.
[[alternative HTML version deleted]]
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--------------------------------------------------------
This is not an offer (or solicitation of an offer) to buy/se...{{dropped}}
On 30/04/07, Y G <gatemaze@gmail.com> wrote:> > Hi, > > is this list only related to R issues or it has a broader context > regarding questions and discussions about statistics. Is there any other > email list or forum for that?Well, just to quickly self-reply my question. From http://www.r-project.org/posting-guide.html *Questions about statistics:* The R mailing lists are primarily intended for questions and discussion about the R software. However, questions about statistical methodology are sometimes posted. If the question is well-asked and of interest to someone on the list, it *may* elicit an informative up-to-date answer. See also the Usenet groups sci.stat.consult (applied statistics and consulting) and sci.stat.math (mathematical stat and probability). *Basic statistics and classroom homework:* R-help is not intended for these. Thanks. [[alternative HTML version deleted]]
You might find the usenet groups sci.stat.math sci.stat.consult to be what you're looking for. --- Y G <gatemaze at gmail.com> wrote:> Hi, > > is this list only related to R issues or it has a > broader context regarding > questions and discussions about statistics. Is there > any other email list or > forum for that? For example, I have a question > regarding variance. It is > defined as: > variance = sum(sq(Xi-mean)) / (N-1) > and I never understood why not define it as > variance = sum(absolute(Xi-mean) / (N-1) > > I read somewhere that this cannot be differentiated > on 0. But, why is it > necessary to be able to differentiate it? > > Thanks. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, > reproducible code. >