The link to the datafiles appears to be case sensitive, so
http://www.es.umb.edu/edg/ECOS611/MIT-IWF.zip
should be:
http://www.es.umb.edu/edg/ECOS611/mit-iwf.zip
Gene Gallagher
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In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Arthur J Kendall) wrote:
We are currently looking at how quantitative risk assessment is used.
=
Doses can be in micrograms, morbidity can be in rates per hundred
thousand =
exposed, mortality in 10 million exposed, and so forth. In this
In article 94o81d$9o4$[EMAIL PROTECTED],
Elliot Cramer [EMAIL PROTECTED] wrote:
Dale Berger [EMAIL PROTECTED] wrote:
: Dear Colleagues,
: A student is evaluating a summer program for junior high students.
One of
: the goals was to raise 'self esteem.' Measures were taken before
the
This post is to clean up a few dangling threads and to correct an error
in my previous post.
In response to Rich, I pointed out yet another potential problem in the
MCAS. School effectiveness is being based on the mean of scaled MCAS
scores, which range from 200 to 280. Rich pointed out that
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Robert J. MacG. Dawson) wrote:
Snip
Interesting. If it's 8.4 degrees Fahrenheit at which he
switches, no conclusion could be drawn for *any* sample size because
the
recorded value would not be a monotonic function of actual
temperature.
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] wrote:
Snip
- I don't know what the authors say, but (on their behalf)
I suggest that maybe the funny range was selected in order
to avoid ignorant comparisons that public tests are prone to.
That is, from these scores, you won't be tempted
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] wrote:
Snip
- I don't know what the authors say, but (on their behalf)
I suggest that maybe the funny range was selected in order
to avoid ignorant comparisons that public tests are prone to.
That is, from these scores, you won't be tempted
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Robert J. MacG. Dawson) wrote:
"Daniel P. B. Smith" wrote:
Can anybody possibly believe that a difference of one point in 245.3
can
possibly be significant? We're talking about schools with a less
than a
maybe sixty fourth-graders in
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Robert J. MacG. Dawson) wrote:
Snip
Wait one... Regression to the mean occurs because of the
_random_
component in the first measurement. Being in an urban center is not
part
of the random component - those schools' grades didn't
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Robert J. MacG. Dawson) wrote:
The school results are presented in a very odd fashion, making it
difficult to assess the patterns.
http://www.doe.mass.edu/ata/ratings00/SPRPDistribTables.html
They are that. Let's try.
These data
The Massachusetts Dept. of Education committed what appears to be a
howling statistical blunder yesterday. It would be funny if not for the
millions of dollars, thousands of hours of work, and thousands of
students' lives that could be affected.
Massachusetts has implemented a state-wide
In article E7AC96207335D411B1E7009027FC2849F87098@EXCHANGE2,
[EMAIL PROTECTED] (Simon, Steve, PhD) wrote:
Snip
[A list of statistical issues raised by the Fl election]
If there were other important statistical issues raised by this
election, let me know so I can add to this list.
Steve
Rich Ulrich wrote:
I think it would be unwise to use random sampling theory, with or
without the finite population correction, to infer what the
percentage
of Bush and Gore votes would be among the non-machine counted votes.
There were several analyses published in the press about
I think it would be unwise to use random sampling theory, with or
without the finite population correction, to infer what the percentage
of Bush and Gore votes would be among the non-machine counted votes.
There were several analyses published in the press about who would
have won a recount,
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] wrote:
Snip
I'd disagree with the "some must get counted as votes" point. Some
may, but it
would depend on people's capacity to discriminate between them. If d'
is good
then few votes should be missassigned.
Thom
There is a very interesting
In article [EMAIL PROTECTED],
Bob Wheeler [EMAIL PROTECTED] wrote:
Hasty writing -- I was responding to the cited
post. More than two questions were considered by
Hengartner -- he had charts indicating the
possible effects of recounting Dade County were it
to behave as did the other
If approximately 2/3 of the tallied votes were for Gore, by what leap
of
logic do you conclude that 1/2 of the untallied votes would have been
for Bush?
The GOP lawyers in their cross of the voting expert argued that people
may have dimpled their chads by handling the ballots, e.g., running
In article [EMAIL PROTECTED],
Jerry Dallal [EMAIL PROTECTED] wrote:
I disagree with those who would use a binomial model for the
overall vote totals to describe the uncertainty in the Florida vote
count. (This constitutes the Type III error discussed in another
thread--the right answer
There seems to be some misunderstanding in the press about a fundamental
difference between a sample of a larger population and a complete
census.
J. A. Paulos in his NY Times article We're Measuring Bacteria With a
Yardstick'
http://www.nytimes.com/2000/11/22/opinion/22PAUL.html
stated:
"Not
The latest polls are out. The New York Times gets an A for
describing the precision and accuracy of their poll. Gallup gets a C-
or D in my book.
The New York Times today:
http://www.nytimes.com/2000/11/06/politics/06METH.html
In theory, in 19 cases out of 20 the results based on such
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] wrote:
Snip
"For results based on the total sample of likely voters, one can say
with 95% confidence that the margin of sampling error is +/- 2
percentage points."
Those guys are supposed to be professionals, and they should have
been
In article [EMAIL PROTECTED],
Gerhard Luecke [EMAIL PROTECTED] wrote:
Can anyone name some references where the problem of using a
DICHOTOMOUS
variable as a DEPENDENT variable in an ANOVA is discussed?
Many thanks in advance,
Gerhard Luecke
Check out Ramsey Schaefer's "The Statistical
A URL for the 1 Nov Gallup poll:
http://www.gallup.com/Poll/releases/pr001101c.asp
This poll has Bush over Gore 48% to 43% with margin of error of 2%.
Wolfgang's post and the thread below indicates that this +/- 2% is the
95% CI, which makes sense given the sample size. With the 2% 95% CI, we
As to Observational studies --
http://www.cnr.colostate.edu/~anderson/thompson1.html
This is a short article and long bibliography. The title is direct:
"326 Articles/Books Questioning the Indiscriminate Use of
Statistical Hypothesis Tests in Observational Studies"
(Compiled by William
You are correct that the Euclidean distance between sample and
species points is NOT what you need to look at. For interpretations of
CA plots:
Michael Greenacre. 1984 Theory and applications of correspondence
analysis. Academic Press
Greenacre, M. and T. Hastie. 1987. The geometric
In article [EMAIL PROTECTED],
jersey [EMAIL PROTECTED] wrote:
Background: I am an ecologist working with intertidal
community structure data. My data is characterised by high
non-normality and lack of equal variance between samples.
Be careful with this. Non-normal abundances distributions
Rich Ulrich wrote:
These are not quite equivalent options since the first one really
stinks -- If you are considering drawing conclusions about causation,
you need *random assignment* and the two Groups of performance are the
furthest thing from random.
Let's see: the simple notion of
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] (Donald Burrill) wrote:
Sounds to me as though you have in fact 5 within-subject variables:
the four you list plus
5) Replications (with 10 levels)
Of course, this is a random factor, whereas the other four are
presumably
fixed factors, but
Try the free student version of AMOS for structural equation
modeling
http://www.smallwaters.com/amos/student.html
AMOS does factor analysis, path analysis
and includes online documentation.
In article 8fjhn0$8rd$[EMAIL PROTECTED],
"Buoy" [EMAIL PROTECTED] wrote:
Hello to all
I'm a
In article [EMAIL PROTECTED],
Uplandcrow wrote:
I teach research methods for social science at a small liberal arts
college.
The level of math in the class is low, I use Richard Black's "Doing
Quantitative Research in the Soc. Sci." and excerpts from
Gujarati's "Basic Econometrics."
SNIP
I
For the natural sciences, try Reyment Joreskog Applied Factor analysis
for the natural sciences, Cambridge Univ Press.
In article [EMAIL PROTECTED],
[EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] wrote:
What are your favorite book(s) on factor analysis?
What do you think of R.
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