I checked with a nerdy geek and was told that it is a waste of
bandwidth to broadcast attachments to an entire mailing list.
Although not every attachment is a virus, NO ASCII text is.
Dr. Knodt's suggestion is entirely consistent with email etiquette.
- Forwarded message from Thomas
Forwarding a query. Reply to mland, not to me.
Margaret Land, Ph.D.
StatisticsMSC 172
Texas AM University-Kingsville
Kingsville TX 78363-8201 fax 361-593-3518
tel 361-593-2235 [EMAIL PROTECTED]
Has
Re assumptions for inference...
- Forwarded message from Robert J. MacG. Dawson -
What is needed in the small-sample case is outside _knowledge_ (not
"well, it _might_ be true" or "in this discipline we usually assume..."
assumptions!) about the distribution - without this we should not
QUESTIONS
Dear friends:
Does anyone know / remember how to obtain the standard deviation of a set
of numbers given only a frequency table?
e.g.,
xf(x)
00.2
10.3
20.2
30.2
40.1
Many thanks.
Chris
ONE POSSIBLE ANSWER:
Here is a worked solution. I used the Windows
An example might shed some light on one point involved here. Recently
Plymouth State College considered the possibility of arming -- well,
part of the question was WHOM. Many of us refered to them as Campus
Security while they insisted they were Campus Police. Looking at old
phone books it
- Forwarded message from [EMAIL PROTECTED] -
Hi
I need some professional advice on a statistics question. I recently
took part in a survey where the scale of responses was given as:
Agree / Tend to Agree / ? / Tend to Disagree / Disagree
The question mark in the middle seems very
Anybody have anything to say about statistical education???
--
_
| |Robert W. Hayden
| | Work: Department of Mathematics
/ |Plymouth State College MSC#29
| |Plymouth, New Hampshire 03264 USA
| * |
- Forwarded message from Jake -
Most of us feel that we know what "margin of error" means but to make
sure we're all on the same page, let's review.
"Margin of error" is a term out of survey polling that refers to the
confidence we have in the results of a given survey. In general, the
- Forwarded message from Herman Rubin -
The model must come from the investigator, not from the data.
Data only helps to choose between models, estimate parameters,
and related questions.
- End of forwarded message from Herman Rubin -
Actually, I think the apparent conflict
- Forwarded message from [EMAIL PROTECTED] -
Since the vote difference between Bush and Gore falls within the margin
of error for the counting process, declaring the winner is
mathematically indeterminable within any reasonable degree of
scientific confidence.
Since we cannot know who
- Forwarded message from Gene Gallagher -
There seems to be some misunderstanding in the press about a fundamental
difference between a sample of a larger population and a complete
census.
- End of forwarded message from Gene Gallagher -
Possibly, but I don't think the Florida
- Forwarded message from Ken -
Of course you'll get what you pay for.
"Comet" [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
I search a good and free:) sofware of stat
- End of forwarded message from Ken -
When I installed Win98 on my computer
I have been looking at math. editors for years. There's no right
answer -- it just depends on what you want to do. For example, the
journals of the American Mathamatical Society want you to submit
articles in TeX or LaTeX, which is the most powerful tool for such
things, but also the hardest
- Forwarded message from Paul W. Jeffries -
What software would you recommend for writing documents that contain
mathematical symbols? Microsoft Word does not have all the symbols I
need.
- End of forwarded message from Paul W. Jeffries -
If it is just a matter of symbols you
1.
The attention focussed on Florida seems to be partly an abberation of the
electoral system and the miscalls in the media. (If we went by popular
vote then there would be no point in trying to call a state.) Florida
is in the spotlight partly because of the close vote there, partly
because
- Forwarded message from by way of Tom Lane [EMAIL PROTECTED] -
From [EMAIL PROTECTED] Tue Nov 14 10:03:28 2000
Return-Path: [EMAIL PROTECTED]
Received: from smtp.mathworks.com (turing.mathworks.com [144.212.95.101])
by oz.plymouth.edu (8.10.2/8.10.0) with ESMTP id eAEF3Rb98330
- Forwarded message from David Heiser -
- Original Message -
From: Dennis [EMAIL PROTECTED]
Hello Newsgroup, I'm searching for real good books on stats. I'm a
student of psychology and we've been taught very much stats. But I
read all the time your postings and wonder why
- Forwarded message from Reg Jordan -
None of these issues (double punching, voting for wrong candidate)
were raised at the polling place at the time of voting.
- End of forwarded message from Reg Jordan -
How do you know that? NPR interviewed one woman who realized she
might
- Forwarded message from Bob Wheeler -
Charles Payne Winsor (It might be "Paine".)
He died in the early 50's. There was a biography
in the American Statistician, I think.
Rich Ulrich wrote:
("Could anyone suggest references for me ...?" would be a gentler way
to request
- Forwarded message from ?? -
on the third syllable
[kalma' gorov]
- End of forwarded message from ?? -
I need help breaking "kalma" into three syllables?-)
_
| |Robert W. Hayden
| | Work:
Jerry Dallal wrote:
I have a note from Frank Anscombe in my files. It says, "Cardano.
See the bit from "De Vita Propria" at the head of Chap. 6 of FN
David's "Games, Gods, and Gambling (1962). That shows that the idea
of a test of significance, informally described, is very ancient."
I
- Forwarded message from Bill Jefferys -
In article [EMAIL PROTECTED], [EMAIL PROTECTED]
(dennis roberts) wrote:
#so, what does the multiplicative "law" in probability mean then?
If A is an event and B is an event, then the probability of the event
AB is given by P(AB)=P(A)P(B) in
- Forwarded message from Michael Granaas -
I honestly believe that there is something to be learned from
memorizing several of the basic formulas that are involved in defining
statistics. I, less elegantly, tell my students that it is important
to have this basic understanding so that
- Forwarded message from [EMAIL PROTECTED] -
Many of these people end up as SAS programmers. Lots of experience
wtih SAS may be more valuable than abstract computer science.
I did take some computer science courses while taking my stats degree.
If you know the fundamentals of
- Forwarded message from Thomas Gatliffe -
NCSS has had all these capabilities for the last 10 years. You must have been
looking a long time ago.
If your objective is both low-sweat statistics and good, fully-customizable
graphics, check out NCSS.
I'm a big fan of NCSS, although I
- Forwarded message from Ronny Richardson -
Several references I have looked at define skewness as follows:
mean median: positive, or right-skewness
mean = median: symmetry, or zero-skewness
mean median: negative, or left-skewness
- End of forwarded
- Forwarded message from dennis roberts -
would one reference microsoft word in the paper? i am not sure one has to
reference the stat package ... or, if you were doing it using a spreadsheet
like excel ... would you reference that?
if you do want to say anything ... just say that
- Forwarded message from Ken -
Another helpful tool to consider is the Standard Deviants Statitics video
tape series. You can purchase it through www.amazon.com - search using
"standard deviants statistics". (yes I mean deviants and not deviates).
They are VERY good tapes intended to
I have added the PSC datasets for Siegel and Morgan to my website in
Statland. These are not the files that come on the disk from the
publisher but rather the data for nearly every example, problem or
exercise in the book -- about 375 files. My favorites are the raw
data files for the
- Forwarded message from Olsen, Chris -
Hello Bob and All --
I think SOME long phrases are discussed in The Browser's Dictionary, by
John Ciardi. I don't know if it is still in print, but it is authoritative
and fascinating. (Perhaps not a lot of statistical terms and phrases,
- Forwarded message from Alexander Bogomolny -
The Harper Collins Dictionary of Mathematics gives the following
definitions:
1. Histogram - a figure that represents a frequency distribution,
consisting of contiguous rectangles with width proportional to the
size of the respective class
I just sent out a posting and immediately got back three automated
messages from people saying they are away. This gave me a great idea
for making money off the Internet -- set up a network for house
burglars! You join every list in sight and send a nonsense message to
them all. Then you
Part-time lecturers are underpaid everywhere. Let's not all dump on
BU who is paying them better than most places do.
--
_
| |Robert W. Hayden
| | Work: Department of Mathematics
/ |Plymouth State College MSC#29
| |
- Forwarded message from [EMAIL PROTECTED] -
My American Heritage Talking Dictionary on CD not only looked up said
latinism, but spoke it as well. Its corrected a number of pronunciations
for me. Most recently schism.In some cases it displays a picture or
map.
I couldn't
Selections from an earlier exchange on EdStat-L are followed by some
comments.
- Forwarded message from Donald Burrill -
On Sat, 5 Aug 2000, Gates, Christopher [OMP] wrote:
Donald, thank you so much for your response. I had the opportunity to
converse with my friend (HOH) on this
- Forwarded message from Peter Lewycky -
I've yet to meet an (adult) respondent who did not know his mother's
maiden name and her birthdate. :)
- End of forwarded message from Peter Lewycky -
We must meet sometime!-)
_
| |Robert W. Hayden
You must have a different audience than I if you think they can spell
other people's names, remember numbers, identify and encode playing
cards, know their mother's maiden name and birthdate, etc. The task
needs to be one they are capable of and motivated to attempt. Maybe
the survey could
- Forwarded message from Daniela Ichim -
In a nonlinear (univariate) regression problem, specifically
a calibration problem in thermometrics, I have the problem of
testing whether a curve expressing a relationship between
Electrical Resistance and Temperature is monotone
versus the
- Forwarded message from Dale Berger -
Thank you for many useful comments and suggestions regarding on-line
data collection.
Several people expressed concerns about the quality of data collected
on-line, even to the point of categorically denouncing the technique.
On-line surveys
While I agree that online surveys are of dubious value, some of the
opposition sounds too moralistic or contentious for my taste. Here is
a parable.
The usual formulae of inferential statistics estimate the error made
by using a random sample instead of a census. If you did not take a
random
- Forwarded message from George W. Cobb -
I don't disagree at all with Bob's point (there goes another chance to
be contentious!) but you can sometimes go a long way using the right
simplifying assumptions. Here's the reference:
O'Conner, M.P., and J.R. Spotilla (1992). "Consider a
- Forwarded message from Susanne Muigg -
now I'm about to finish my thesis, but still looking for some literature
about the advantages and disadvantages of a (student) convenience sample,
which I had used. Unfortunately, I couldn't find anything, even if I've done
quite an extensive
Re the chicks data posted by Don Burrill...
A reference is Snedecor and Cochran, Statistical Methods (7th ed.),
Iowa State University Press, Ames, IA, 1980, pp.394-406, which gives
an extensive analysis, including fitting an exponential and orthogonal
polynomials.
There is more on orthogonality
- Forwarded message from Sandra -
I'm a PhD student (2nd year). Do you know if there are any summer courses in
statistics?
- End of forwarded message from Sandra -
I took some at Iowa State many years ago.
_
| |Robert W. Hayden
| |
This may not fully answer all your questions, but the various formulas
for inference for regression have a place where you plug in THE
variance of the points around the regression model, i.e., they treat
this as a constant. If it is not a constant, the results of the
formulas will not be
The standard deviation of a single batch of numbers is a typical value
for the residuals (deviations from the mean). If you divide by n, it
is the RMS mean of the residuals. You can check your calculation of
the s.d. by comparing it to the residuals. The mean is the measure of
center that
- Forwarded message from Frank E Harrell Jr -
I'd like to make a somewhat related point. There are many educational
tools that I've found have a great effect on non-statisticians. One if these
is to take one of their datasets, randomly permute the column of Y-values,
go through their
- Forwarded message from Debasmit Mohanty -
I think, now is the time when we have to decide "Do we accept DATA MINING as
a part of statistics or do we keep neglecting this field as before".
I am sure there would be few statistics students like me who feel that Data
Mining is very much
- Forwarded message from Kristen Lanum -
Hello! We are trying to render the symbols for Xbar and square root in
a statistics manual, which will primarily be used by staff using
Internet Explorer 5. Is there any way to render these symbols for the
web other than making them into graphics?
"Brian E. Smith" wrote:
I am trying to formulate a calculator policy in a department that currently
allows any calculator except "those capable of storing text".
Brian said nothing to suggest he authored or supports these policies
so please don't be too hard on him if you (as I) disagree
- Forwarded message from Herman Rubin -
It is the concepts which are the
most important part, and concepts need little, if any,
practice.
One should give a variety of exercises, and the student
should do as much as is necessary.
- End of forwarded message from Herman Rubin -
experiencing inner peace. Bob Hayden wrote: There
was talk of making this into a subscriber-only list. Perhaps
it is time to do that and to limit membership to the civil.
_
| | Robert W. Hayden
| | Department of Mathematics
/ | Plymouth
- Forwarded message from Wolfgang Rolke -
From [EMAIL PROTECTED] Sat Jan 22 10:47:51 2000
From: Wolfgang Rolke [EMAIL PROTECTED]
Hi,
I am looking for information (journal article, web site ect.) on the
difference in birth rates for boys and girls. Specifically I would like
to find
Dave Nulton wrote:
Quite frankly Robert the details are proprietary. I suppose I could have
been more descriptive, but I don't see what the shape of my distribution
have to do with what it represents
Well, our expertise is also proprietary!-)
_
| | Robert W. Hayden
- Forwarded message from Herman Rubin -
Galileo questioned the conclusions which had been obtained
from Aristotle's philosophizing
Even the use of "algebraic" notation escaped the people who would
have done much more if they had it. It was a half millennium after
Archimedes and
- Forwarded message from David A. Heiser -
I don't agree with Demming. Life is essentially a matter of diversity, and
being able to find one's own "niche". The process of ranking is inherent in
life whenever there is stress on a population. Going to college is indeed
"stress".
- End
- Forwarded message from Olsen, Chris -
It would seem to me that more than this most can be said. If my reading
of the central limit theorem is up to snuff, I should be able to use the "Z
test with s" without an underlying assumption of the normality of the parent
population, required
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