Title: RE: Mean and Standard Deviation
Well, what
about the standard normal distribution: N(0,1)?
Dale N. Glaser, Ph.D.
Pacific Science
& Engineering Group
6310 Greenwich
Drive; Suite 200
San Diego, CA
92122
Phone: (858)
535-1661 Fax: (858) 535-1665
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In article <[EMAIL PROTECTED]>, Edward
Dreyer <[EMAIL PROTECTED]> wrote:
> A colleague of mine - not a subscriber to this helpful list - asked me if
> it is possible for the standard deviation
> to be larger than the mean. If so, under what conditions?
>
Easily. Any highly skewed distribution
At 04:32 PM 10/12/01 -0500, you wrote:
>A colleague of mine - not a subscriber to this helpful list - asked me if
>it is possible for the standard deviation
>to be larger than the mean. If so, under what conditions?
what about z scores??? mean = 0 and sd = 1
>At first blush I do not think so
Title: RE: Mean and Standard Deviation
Edward Dreyer writes:
>A colleague of mine - not a subscriber to this helpful
>list - asked me if it is possible for the standard deviation
>to be larger than the mean. If so, under what conditions?
>
>At first blush I do not think so - but th
Is there any mathematical analysis to find how much the two peaks stand
out from the other data? Is there any formulas to find the
variance/deviation/etc that's similar to the unimodal distribution case?
Thanks a lot.
Cheers,
Desmond
==
I had promised a colleague a story that illustrates probability and
now I forgot how to solve it formally. The story is about six
students who go off on a trip and get drunk the weekend before
their statistics final. They return a few days late and beg for a
second chance to take the final exa
A colleague of mine - not a subscriber to this helpful list - asked me if
it is possible for the standard deviation
to be larger than the mean. If so, under what conditions?
At first blush I do not think so - but then I believe I have seen
some research results in which standard devia
At 01:44 PM 10/12/01 -0400, Lise DeShea wrote:
>I tell my students that the ANOVA is not robust to violation of the equal
>variances assumption, but that it's a stupid statistic anyway. All it can
>say is either, "These means are equal," or "There's a difference somewhere
>among these means,
Lise advised "I tell my students that the ANOVA is not
robust to violation of the equal variances assumption, but that it's a stupid
statistic anyway. All it can say is either, "These means are equal," or "There's a difference somewhere among these
means, but I can't tell you where it is.
Re robustness of the between-subjects ANOVA, I obtained
permission from Dr. Rand Wilcox to copy three pages from his book,
"New Statistical Procedures for the Social Sciences," and place
them on a webpage for my students. He cites research showing that
with four groups of 50 observations each and
At 12:59 PM 10/12/01 -0300, you wrote:
>While consulting people from depts of statistics about this, a few of them
>were arguing that these assumption testing are just a "legend" and that
>there is no problem in not respecting them !
note: you should NOT respect any stat expert who says that the
Voltolini wrote:
>
> Hi, I am Biologist preparing a class on experiments in ecology including
> a short and simple text about how to use and to choose the most commom
> statistical tests (chi-square, t tests, ANOVA, correlation and regression).
>
> I am planning to include the idea that testin
Hi, I am Biologist preparing a class on experiments in ecology including
a short and simple text about how to use and to choose the most commom
statistical tests (chi-square, t tests, ANOVA, correlation and regression).
I am planning to include the idea that testing the assumptions for
parametric
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