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A common approach is to change the focus from the inevitable fact of
death to the duration of life within the treatment and control
I've heard this before -- probably read it in stat
books. It isn't true. Galton worried over the
problem until he understood the statistical
mechanism. He even designed a device (the
Quincunx) to demonstrate how it works. Steve
Stigler has a section on it in his new book.
Thus Galton found
At 10:41 AM -0400 16/1/01, Robert J. MacG. Dawson wrote:
There are those who would omit the word "small" from this; myself, I am
prepared to use a large data set as evidence of its own approximate
normality, largely because when the data set is large, "approximate
normality" may
here is an example to ponder ...
let's say that you are an instructor in a course and have decided to
administer a 100 point final exam ... the very first day of class ... and
then some alternate form of that 100 item test the very last day of class
... in general, to see what people "gain"
On 16 Jan 2001 17:38:43 -0800, [EMAIL PROTECTED] (Rich Strauss)
wrote:
I have what seems to be a straightforward question involving a conditional
probability, but I must be missing something because I can't quite get a
handle on it. Let's say I have treatment and control groups with
You see, you are using a qualitative estimate of non-normality (box
plot)! I want a rule based on a quantitative estimate.
I may disagree to the above notion. Yes, data visualization such as using
boxplots, histograms, and Q-Q plots involves subjective judgment and does
not have a strict
On Wed, 17 Jan 2001, Bob Wheeler wrote:
I've heard this before -- probably read it in stat
books. It isn't true. Galton worried over the
problem until he understood the statistical
mechanism.
you may abe right; that's why I said apparrently
J. Williams [EMAIL PROTECTED] wrote:
Would this not
: be the same as the offspring of either the very tall or the very short
: among us moving toward an arithmetic average? Is it inconceivable
: that a pair of dullards could produce a Beethoven or a Fermi for
: example? Frankly, I believe old
here are some of the actual reported galton data ... scatterplots between
fathers' and sons' heights ... interesting tidbit about these data ...
clearly, some fathers sired not only sons ... but also daughters ...
S ... for the case of daughters ... the value that was imputed was
a
At 12:56 PM 1/17/01 -0400, Robert J. MacG. Dawson wrote:
The testing example is not a stationary process,
well, does this mean that NO testing example when there is a less than
perfect r between the two sets of "test" measures ... would qualify for
being a context in which to
Paul R Swank forwarded Dennis' scattterplot:
- *
post - * *
- *
- 2 *
80+ * 2 *
- 2 * * *
- * * *
- * *
- * *
60+
- * *
- * * *
-
- *
40+ *
-
-
+-+-+-+-+-+--pre
10.0 15.0 20.0 25.0 30.0 35.0
Aha! So
On Tue, 16 Jan 2001 14:14:36 GMT, [EMAIL PROTECTED] (J. Williams)
concluded:
Maybe, I am missing something, but think the original question and
response items are quite clear and concise. I see nothing
particularly "loose" about it. The essentials of a class interval
used in frequency
assessment systems has a good array of test analysis software
http://www.assess.com/softmenu.html
At 10:17 PM 1/17/01 +0100, Sky wrote:
Maybe they have something for you here: http://www.gamma.rug.nl
They have a couple of programs on Rasch modelling and some other Item
Respons Theory programs.
divide at the midpoint of the pretest to form two equal size groups.
At 01:37 PM 1/17/01 -0500, you wrote:
>At 12:28 PM 1/17/01 -0600, Paul R Swank wrote:
>>But if you group the subjects on the basis of their pretest scores, the
>>lowest group gains 23.1 points while the highest group only gains
At 03:57 PM 1/17/01 -0500, Rich Ulrich wrote:
- Okay, here is my answer before I repeat the official ones.
The "greatest possible difference" is *at least* one foot.
If this is a dedicated math question, the aspect of roundoff should
give "one foot (minimum)"; and any slightest introduction
It is also possible to simulate rasch modeling using a mixed models approach with a binomial distribution and logit link function.
At 10:17 PM 1/17/01 +0100, you wrote:
>Maybe they have something for you here: http://www.gamma.rug.nl
>They have a couple of programs on Rasch modelling and some
These websites sells an addin that generates ARCH models in excel:
http://www.numa.com/bookshop/books/7201.htm
http://www.moneyextra.com/bookclub/books/7201.htm
This looks like someones college project, that he used ARCH models you can
download his excel file here:
Gimenez Olivier [EMAIL PROTECTED] wrote:
... we have three samples arising from three multinomials
with the same number of cells. This can be represented as a table:
n11 n12 ... n1k (1)
n21 n22 ... n2k (2)
n31 n32 ... n3k (3)
We would like to know whether the last sample
I would love to find a couple good texts on the design and analysis of
experiments and experimental data. Could someone recomment to me a few good
text books on the subject and in particular those that emphasize biological
or pharmaceutical experimentation.
Thank you very much in advance,
Dave
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