Don asked: "But back to your retail trade: if they advertise a 150%
discount
directly, without referring to the sequence of three 50% discounts, might
they not be liable to legal action for misrepresentation?"
Perhaps in the distant past, when our government attempted to protect the
rights of
I was about to respond along the same lines, but with genomics and
genetic epidemiology entering the picture there's a certain truth to
it. OTOH, not so much that I would characterize the field that way.
Jerrold Zar wrote:
>
> Dennis Roberts:
>
> I wonder what makes you say what you did below.
On Fri, 14 Dec 2001, Jill Binker wrote:
> If remark about putting numbers on a single line is referring to:
>
> >"They record the results of their mental calculations using a
> > horizontal format." For example, 86+57=86+50+7=136+7=143.
>
> Then I see nothing wrong with this (and it has NOTHING t
On Fri, 14 Dec 2001, Wuensch, Karl L wrote:
> I came across a table of costume jewelry at a department store with a
> sign that said "150% off. " I asked them how much they would pay me to
> take it all off of their hands. I had to explain to them what 150%
> meant, and they then explained t
Dennis Roberts:
I wonder what makes you say what you did below. Are there some
biostatistics textbooks that have given you that impression?
Jerrold H. Zar, Professor
Department of Biological Sciences
Northern Illinois University
DeKalb, IL 60115
[EMAIL PROTECTED]
>>> Dennis Roberts <[EMAIL PRO
Title: Limited Time Offer!
You are receiving this email as a subscriber to
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On Fri, 14 Dec 2001 09:22:26 +1100, "colsul" <[EMAIL PROTECTED]>
wrote:
> Read the request closely as answering newsgroup queries without
> understanding what is said can make you look, no, confirm you are stupid.
In Sensitivity-group country, we try to say (if confrontation is
necessary) that
Thanks a lot!
"IPEK" <[EMAIL PROTECTED]> wrote in message 9v88vu$86d$[EMAIL PROTECTED]">news:9v88vu$86d$[EMAIL PROTECTED]...
> Do you know any online used bookstore other than Amazon? I need to find
some
> old stat and OR books.
>
>
If remark about putting numbers on a single line is referring to:
>"They record the results of their mental calculations using a
> horizontal format." For example, 86+57=86+50+7=136+7=143.
Then I see nothing wrong with this (and it has NOTHING to do with what
sorts of paper you bank will be send
At 02:20 PM 12/14/01 -0500, Wuensch, Karl L wrote:
>I came across a table of costume jewelry at a department store with a sign
>that said "150% off. " I asked them how much they would pay me to take it
>all off of their hands. I had to explain to them what 150% meant, and
>they then explaine
D]
Subject: Re: Statistical
illiteracy (Just bragging)
I
received a credit report telling me that my rating was higher than 100%
of the persons who received them. You can't imagine how proud and
happy I was to learn that my rating was even higher than my own.
I throw in the following quote from an article by Dea Birkett
on the "National Numeracy Strategy" (Guardian, Tuesday December 11)
[ see the link "And counting" on]
[ http://www.education.guardian.co.uk/higher/maths/ ]
Columns are the first casualty in this push for underst
Jerry Dallal wrote:
>
> "Robert J. MacG. Dawson" wrote:
> >
> > Jerry Dallal wrote:
> > >
> > > "Robert J. MacG. Dawson" wrote:
> > > >
> > > > Art Kendall wrote:
> > > >
> > > > . Mathematical
> > > > > statisticians need more course work
In <9vbhs3$9im$[EMAIL PROTECTED]> Ronald Bloom wrote:
> [EMAIL PROTECTED] wrote:
> > Today's story from the Associated Press, "Study: American kids getting
fatter
> > at disturbing rate".
>
> > "By 1998, nearly 22 percent of black children ages 4 to 12 were
overweight,
>
> []
>
> > ov
I received a credit report telling me that my rating was higher than 100%
of the persons who received them. You can't imagine how proud and
happy I was to learn that my rating was even higher than my own.
[EMAIL PROTECTED] wrote:
> Today's story from the Associated Press, "Study: American kids getting fatter
> at disturbing rate".
> "By 1998, nearly 22 percent of black children ages 4 to 12 were overweight,
[]
> overweight. ...Overweight was defined as having a body-mass index higher
>
Read the request closely as answering newsgroup queries without
understanding what is said can make you look, no, confirm you are stupid.
"Glen Barnett" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> colsul wrote:
> >
> > Does anyone know of a website that de
This is a multi-part message in MIME format.
--=_NextPart_000_000C_01C183E6.195A0050
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Dear all,
I have a question on finding steady-state probabilities in a Markov =
process.
Suppose there are
"Robert J. MacG. Dawson" wrote:
>
> Jerry Dallal wrote:
> >
> > "Robert J. MacG. Dawson" wrote:
> > >
> > > Art Kendall wrote:
> > >
> > > . Mathematical
> > > > statisticians need more course work than general statisticians. Many
> > > > a
Jerry Dallal wrote:
>
> "Robert J. MacG. Dawson" wrote:
> >
> > Art Kendall wrote:
> >
> > . Mathematical
> > > statisticians need more course work than general statisticians. Many
> > > agencies pay 15% more to a math statistician than a
"Robert J. MacG. Dawson" wrote:
>
> Art Kendall wrote:
>
> . Mathematical
> > statisticians need more course work than general statisticians. Many
> > agencies pay 15% more to a math statistician than a general
> > statistician.
>
>
On 7 Dec 2001 14:24:17 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote:
> At 08:08 PM 12/7/01 +, J. Williams wrote:
> >On 6 Dec 2001 11:34:20 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote:
> >
> > >if anything, selectivity has decreased at some of these top schools due to
> > >the fact that
IPEK <[EMAIL PROTECTED]> wrote in sci.stat.edu:
>Do you know any online used bookstore other than Amazon? I need to find some
>old stat and OR books.
Someone recommended http://www.abebooks.com and I second that
recommendation. However, if you use
http://www.bookfinder.com
you get a sear
Art Kendall wrote:
. Mathematical
> statisticians need more course work than general statisticians. Many
> agencies pay 15% more to a math statistician than a general
> statistician.
So what you're saying is that it isn't a diffe
In the United States they are two job series for federal civil service.
A job series is shorthand for a title.
A person can be called an economist, accountant, mathematical
statistician, statistician, program analyst, letter carrier, research
psychologist, etc. if they meet minimum standards. Mat
> In article <[EMAIL PROTECTED]>,
> Andreas Karlsson <[EMAIL PROTECTED]> wrote:
> >What is (are) the difference(s) between Statistics and Mathematical
> >Statistics?
Dare I point out that "Mathematical " is popularly perceived
as meaning "it's there, but it's of purely academic interest,
and you
colsul wrote:
>
> Does anyone know of a website that deals with basic statistic formulae
> and/or business math? Also, I am looking for a text book that could give me
> a grounding in the basics of statistics, stat. analysis and business maths.
> I need to cram so I have some idea for a job inter
In article <9v89fi$7e7$[EMAIL PROTECTED]>,
Michael London <[EMAIL PROTECTED]> wrote:
>An introduction to mathematical statistics by Bain and Engelhart deals with
>this topic
>ML
>"Clay S. Turner" <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>> You have prob
In article <[EMAIL PROTECTED]>,
Christopher Tong <[EMAIL PROTECTED]> wrote:
>On 11 Dec 2001, Herman Rubin wrote:
>> Most courses in physics are courses in mathematical physics.
>This is blatantly incorrect. Courses called "Mathematical Methods of
>Physics" are common, and some courses are call
This is one of the BEST sources for used books: http://www.powells.com/
Hope this helps.
reg
- Original Message -
From: IPEK <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, December 12, 2001 1:51 PM
Subject: used books
> Do you know any online used bookstore other than Ama
Try http://www.abebooks.com/
Alan
IPEK wrote:
>
> Do you know any online used bookstore other than Amazon? I need to find some
> old stat and OR books.
>
> =
> Instructions for joining and leaving this list and remarks about
> the
try ... http://www.bookfinder.com ... you might have luck there
At 11:51 AM 12/12/01 -0700, IPEK wrote:
>Do you know any online used bookstore other than Amazon? I need to find some
>old stat and OR books.
>
>
>
>
>=
>Instructions fo
An introduction to mathematical statistics by Bain and Engelhart deals with
this topic
ML
"Clay S. Turner" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> You have probably thought of this, but the age old standard is the Chi
> Square test.
>
> One thing abo
U¿ytkownik "Nathaniel" <[EMAIL PROTECTED]> napisa³ w wiadomo¶ci
news:9v3d79$2rj$[EMAIL PROTECTED]...
> Hi,
>
> Sorry for question, but how is the english word for @
> Pleas forgive me.
>
> N.
Thank everyone for valuable information.
Nathaniel
==
On 11 Dec 2001, Herman Rubin wrote:
> Most courses in physics are courses in mathematical physics.
This is blatantly incorrect. Courses called "Mathematical Methods of
Physics" are common, and some courses are called "Mathematical
Physics" even though they are really methods courses. But these
Stan Brown wrote:
>
> The file type was RTF. Unless I'm _VERY_ much mistaken, RTF cannot
> carry macros of any sort, let alone viruses.
> Oops, there is one loophole:
Yes, a loophole. In fact, one can embed a destructive program in a
pure ASCII file that can affect some machines. (Hint: it is
In article <[EMAIL PROTECTED]>,
EugeneGall <[EMAIL PROTECTED]> wrote:
>>Andrew Morse wrote:
>>>Who was the first to say "Correlation does not imply causation" in so many
>>>words? I know that the idea dates back to David Hume, but Hume did his
>>>work about a century before the term "correlation
nstration of the equivalence of regression and traditional ANOVA,
> just point your browser to
> http://core.ecu.edu/psyc/wuenschk/StatHelp/ANOVA=reg.rtf.
>
> -Original Message-
> From: Stephen Levine [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, December 11, 2001 3:47
In article <[EMAIL PROTECTED]>,
Jerry Dallal <[EMAIL PROTECTED]> wrote:
>Herman Rubin wrote:
>> In article <[EMAIL PROTECTED]>,
>> Andreas Karlsson <[EMAIL PROTECTED]> wrote:
>> >What is (are) the difference(s) between Statistics and Mathematical
>> >Statistics?
>> Mathematical statistics is th
> In article <[EMAIL PROTECTED]>,
> Andreas Karlsson <[EMAIL PROTECTED]> wrote:
> >What is (are) the difference(s) between Statistics and Mathematical
> >Statistics?
The difference is not unlike that between Physics and Mathematical
Physics. One is a science, which is judged by its contact with
Jerry Dallal <[EMAIL PROTECTED]> wrote in sci.stat.edu:
>It's lunch hour. I'm browsing. Shall I click on a link to a file
>type that has the potential to carry viruses? OT1H, Karl is a
>regular poster. OTOH, why run the risk? I guess I'll download and
>look at it in WordView.
The file type w
Herman Rubin wrote:
>
> In article <[EMAIL PROTECTED]>,
> Andreas Karlsson <[EMAIL PROTECTED]> wrote:
> >What is (are) the difference(s) between Statistics and Mathematical
> >Statistics?
>
> Mathematical statistics is the basis of whatever statistical
> methods are used correctly, if you mean t
In article <[EMAIL PROTECTED]>,
Jimc10 <[EMAIL PROTECTED]> wrote:
>I am using a maximum likelihood algorythym to fit an electophysiologic data to
>a series of theoretical models. I am interesting in comparing two models wich
>differ in the number of free parameters, the simpler being a subhypothes
In article <[EMAIL PROTECTED]>,
Andreas Karlsson <[EMAIL PROTECTED]> wrote:
>What is (are) the difference(s) between Statistics and Mathematical
>Statistics?
Mathematical statistics is the basis of whatever statistical
methods are used correctly, if you mean the general subject
of statistics.
Th
t your browser to
>http://core.ecu.edu/psyc/wuenschk/StatHelp/ANOVA=reg.rtf.
>
>-Original Message-
>From: Stephen Levine [mailto:[EMAIL PROTECTED]]
>Sent: Tuesday, December 11, 2001 3:47 AM
>To: Karl L. Wuensch
>Subject:Re: When does correlation imply
Nathaniel:
The symbol @ belongs to the cateqory of special characters in English.
Although it is often rendered as "commercial at" in a technical context, in
the vernacular (and on the net) it is most often rendered as simply"at."
I can't help but advise that, since English is clearly your se
Thank everyone for valuable information.
Nathaniel
Uzytkownik "Art Kendall" <[EMAIL PROTECTED]> napisal w wiadomosci
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> "at"usually indicate some kind of rate or unit price 10 pounds @ $1
> per pound
>
> on the net is is used as a separator betwe
Nathaniel wrote:
>
> Hi,
>
> Sorry for question, but how is the english word for @
> Pleas forgive me.
You're forgiven...
The New Hacker's Dictionary gives:
common: at sign; at; strudel
rare (and often facetious): vortex, whorl, whirlpool , cyclone, snail,
ape, cat
>Andrew Morse wrote:
>
>>Who was the first to say "Correlation does not imply causation" in so many
>>words? I know that the idea dates back to David Hume, but Hume did his
>>work about a century before the term "correlation" acquired its modern
>>statitical meaning.
>
>It certainly wasn't Hume,
Thanks...
CCC
"Clay S. Turner" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hello Chia,
> No actually they are used to extract the distribution from the data.
> They do this by a process known as resampling.
>
> Clay
>
>
>
> Chia C Chong wrote:
> >
> > Hi!!
>
> Sigma is hardly ever known, so you must use t. Then why not simply tell
> the students: "use the t table as far as it goes, (usually around
> n=120), and after that, use the n=\infty line (which corresponds to the
> normal distribution). Then there is no need for a rule for "when to use
> z, w
> 3) When n is greater than 30 and we do not know sigma, we must estimate
> sigma using s so we really should be using t rather than z.
you are wrong. you use t-distribution not because you don't know sigma,
but because your statistic has EXACT t-distribution under certain
conditions. I know tha
besides, who needs those tables? we have computers now, don't we?
I was told that there were tables for logarithms once. I have not seen one
in my life. Is not it the same kind of stuff?
>
> 3. Outdated.
>
> on the grounds that when sigma is unknown, the proper distribution is t
> (unless N is
-Original Message-
Dennis Roberts makes a good point here
>i repeat ... the r value shows the extent to which a straight line (in a 2
>variable problem) can pass through a scatterplot and, be close TO the data
>points
>in that sense, r is an index value for the extent to which a straig
RE: The Poisson process and Lognormal action time.
This kind of problem arises a lot in the actuarial literature (a
process for the number of claims and a process for the claim size),
and the Poisson and the lognormal have been used in this context - it
might be worth your while to look there
"at"usually indicate some kind of rate or unit price 10 pounds @ $1
per pound
on the net is is used as a separator between the id of an individual and
his/her location
[EMAIL PROTECTED] id spoken as john dot smith at harvard dot e d u.
until the early-80's or so dot was spoken as point as
The name given to the symbol @ in international standard character
sets is 'commercial at'.
See
http://www.quinion.com/words/articles/whereat.htm
for a history of the symbol.
Richard Wright
On Mon, 10 Dec 2001 23:34:19 +0100, "Nathaniel" <[EMAIL PROTECTED]>
wrote:
>Hi,
>
>Sorry for questio
On Mon, 10 Dec 2001 12:57:29 -0400, Gus Gassmann
<[EMAIL PROTECTED]> wrote:
> Art Kendall wrote:
>
> (putting below the previous quotes for readability)
>
> > Gus Gassmann wrote:
> >
> > > Dennis Roberts wrote:
> > >
> > > > this is pure speculation ... i have yet to hear of any convincing case
In article <[EMAIL PROTECTED]>,
kjetil halvorsen <[EMAIL PROTECTED]> wrote:
>Slutsky's theorem says that if Xn ->(D) X and Yn ->(P) y0, y0 a
>constant, then
>Xn + Yn ->(D) X+y0. It is easy to make a counterexample if both Xn and
>Yn converges in distribution. Anybody have an counterexample when Y
At 03:42 PM 12/10/01 +, Jerry Dallal wrote:
>Dennis Roberts wrote:
>
> > this is pure speculation ... i have yet to hear of any convincing case
> > where the variance is known but, the mean is not
>
>A scale (weighing device) with known precision.
as far as i know ... knowing the precision is
Jon Cryer wrote:
> But then you should use a binomial (or hypergeometric) distribution.
>
> Jon Cryer
>
> p.s. Of course, you might approximate by an appropriate normal
> distribution.
Quite, and then you are in a situation where you know (or at least
pretend to know)
the population variance, t
Mathematical statistics will require that you take 5, rather than 2, Advil
or Tylenol.
At 06:24 PM 12/10/2001 +, Andreas Karlsson wrote:
>What is (are) the difference(s) between Statistics and Mathematical
>Statistics?
>
>
>=
>
Only as an approximation.
At 12:57 PM 12/10/01 -0400, you wrote:
>Art Kendall wrote:
>
>(putting below the previous quotes for readability)
>
> > Gus Gassmann wrote:
> >
> > > Dennis Roberts wrote:
> > >
> > > > this is pure speculation ... i have yet to hear of any convincing case
> > > > where
Hello Chia,
No actually they are used to extract the distribution from the data.
They do this by a process known as resampling.
Clay
Chia C Chong wrote:
>
> Hi!!
>
> Thanks for your reply...do you mean that Jackknife and Bootstrapping methods
> area also some kind of goodness-of-fit
Hi!!
Thanks for your reply...do you mean that Jackknife and Bootstrapping methods
area also some kind of goodness-of-fit tests??
Cheers,
CCC
"Clay S. Turner" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> You have probably thought of this, but the age old
Usually I would use software. As I tried to show is the sample syntax I posted
earlier, it doesn't usually make much difference whether you use z or t.
Gus Gassmann wrote:
> Art Kendall wrote:
>
> (putting below the previous quotes for readability)
>
> > Gus Gassmann wrote:
> >
> > > Dennis Rob
Art Kendall wrote:
(putting below the previous quotes for readability)
> Gus Gassmann wrote:
>
> > Dennis Roberts wrote:
> >
> > > this is pure speculation ... i have yet to hear of any convincing case
> > > where the variance is known but, the mean is not
> >
> > What about that other applicati
the sample mean of the dichotomous (one_zero, dummy) variable is known, It
is the proportion.
Gus Gassmann wrote:
> Dennis Roberts wrote:
>
> > this is pure speculation ... i have yet to hear of any convincing case
> > where the variance is known but, the mean is not
>
> What about that other ap
You have probably thought of this, but the age old standard is the Chi
Square test.
One thing about empirical distributions is that they may not be one of
the standard forms. This is why the Jackknife method and then later the
Bootstrapping methods were developed. Thus you can extract the
distr
I always thought that the precision of a scale was
proportional
to the amount weighed. So don't you have to know the mean
before you
know the standard deviation? But wait a minute - we are trying
assess
the size of the mean!
Jon Cryer
At 03:42 PM 12/10/01 +, you wrote:
Dennis Roberts wrote:
>
Dennis Roberts wrote:
> this is pure speculation ... i have yet to hear of any convincing case
> where the variance is known but, the mean is not
A scale (weighing device) with known precision.
=
Instructions for joining and leavi
But then you should use a binomial (or hypergeometric)
distribution.
Jon Cryer
p.s. Of course, you might approximate
by an appropriate normal distribution.
At 11:39 AM 12/10/01 -0400, you wrote:
Dennis Roberts wrote:
> this is pure speculation ... i have yet to hear of any convincing
case
> where
Dennis Roberts wrote:
> this is pure speculation ... i have yet to hear of any convincing case
> where the variance is known but, the mean is not
What about that other application used so prominently in texts of
business statistics, testing for a proportion?
At 04:14 AM 12/10/01 +, Jim Snow wrote:
>"Ronny Richardson" <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> > A few weeks ago, I posted a message about when to use t and when to use z.
>
>I did not see the earlier postings, so forgive me if I repeat advic
Ronny Richardson wrote:
>
> Are they
>
> 1. Wrong
> 2. Just oversimplifying it without telling the reader
Neither, really. The MAIN objection to "z over 30" is that it adds an
an unnecessary step to the decision process. If it actually simplified
things greatly I reckon we could live
This is a multi-part message in MIME format.
--F89CEF3F1CDF5660163AA634
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
If your conclusion differs whether you use t or z, your decision is "at
the
edge".
The total uncertainty (T) in a decision has two part
Ronny Richardson wrote:
>
> A few weeks ago, I posted a message about when to use t and when to use z.
> In reviewing the responses, it seems to me that I did a poor job of
> explaining my question/concern so I am going to try again.
>
> I have included a few references this time since one res
[EMAIL PROTECTED] (Ronny Richardson) wrote in message
news:<[EMAIL PROTECTED]>...
> A few weeks ago, I posted a message about when to use t and when to use z.
> In reviewing the responses, it seems to me that I did a poor job of
> explaining my question/concern so I am going to try again.
>
> I
"Ronny Richardson" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> A few weeks ago, I posted a message about when to use t and when to use z.
I did not see the earlier postings, so forgive me if I repeat advice already
given.:-)
1. The consequences of usi
On Sun, 9 Dec 2001, Ronny Richardson wrote in part:
> Bluman has a figure (2, page 333) that is supposed to show the student
> "When to Use the z or t Distribution." I have seen a similar figure in
> several different textbooks.
So have I, sometimes as a diagram or flow chart, sometimes in par
"Jacek Gomoluch" <[EMAIL PROTECTED]> wrote in message
news:<9uqkmv$954$[EMAIL PROTECTED]>...
> In a stochastic process the number of customers which are arriving at a
> server (during a time intervall) is desribed by a Poisson distribution:
>
> P(n)=exp(-v) * (v^n)/(n!)
>
> Each arriving custom
Andrew Morse wrote:
>Who was the first to say "Correlation does not imply causation" in so many
>words? I know that the idea dates back to David Hume, but Hume did his
>work about a century before the term "correlation" acquired its modern
>statitical meaning.
It certainly wasn't Hume, who's ar
is it "for you!" ? (I hope there are Seinfeld fans here)
On 8 Dec 2001, Alexander wrote:
> Hello, I am a professional web-programmer.
> (php/perl/mySQL/javascript/HTML).
> I want to work with you... If you are interested in my help, please
> write me:
> [EMAIL PROTECTED]
> [EMAIL PROTECTED]
> [E
On Fri, 07 Dec 2001 04:59:46 GMT, Richard J Burke
<[EMAIL PROTECTED]> wrote:
> jenny wrote:
>
> > What should I do with the missing values in my data. I ned to perform
> > a t test of two samples to test the mean difference between them.
> >
> > How should I handle them in S-Plus or SAS?
> >
> >
At 08:08 PM 12/7/01 +, J. Williams wrote:
>On 6 Dec 2001 11:34:20 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote:
>
> >if anything, selectivity has decreased at some of these top schools due to
> >the fact that given their extremely high tuition ...
i was just saying that IF anything had ha
On 6 Dec 2001 11:34:20 -0800, [EMAIL PROTECTED] (Dennis Roberts) wrote:
>generally speaking, it is kind of difficult to muster sufficient evidence
>that the amount of grade inflation that is observed ... within and across
>schools or colleges ... is due to an increase in student ability
>
>i f
If the poisson arrival process and the work process are independent,
then have a look at Wald's law in (almost) any probability book. For
example, the mean amount of work is then simply the product of the means
of each RV, in your case:
E(amount of work in a fixed time interval)=v*E(U) where U is
out.
Jay
[EMAIL PROTECTED] wrote:
> Classic study: Correlation between local stork population and local births.
>
> -Original Message-
> From: Stu [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, December 06, 2001 1:08 AM
> To: [EMAIL PROTECTED]
> Subject: Re: When does co
Hi
On 6 Dec 2001, David Heiser wrote:
> Most of the focus is on structural equation modeling (SEM). For
> statisticians, a quick referral to Jim Steiger's article "Driving Fast in
> Reverse" in JASA March 2001, p331-p338 (if you have it around) is a quick
> discourse on SEM and the inherent probl
jenny wrote:
> What should I do with the missing values in my data. I ned to perform
> a t test of two samples to test the mean difference between them.
>
> How should I handle them in S-Plus or SAS?
>
> Thanks.
> JJ
If you are doing paired tests, then the pairs with missing values will
have
The issue of causality from the results of fitting a model to data has been
a major topic on SEMNET over the last many years.
If anyone wishes to pursue ideas on this and related issues, subscribe to
[EMAIL PROTECTED]
Most of the focus is on structural equation modeling (SEM). For
statisticians,
i would say that karl has demonstrated that IF we know conditions of
manipulation or not ... we can have a better or lesser idea of what (if
anything) impacted (caused?) what
that i will grant him
to argue that r or eta has anything to do with this ... i would
respectfully disagree
they are
Classic study: Correlation between local stork population and local births.
-Original Message-
From: Stu [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 06, 2001 1:08 AM
To: [EMAIL PROTECTED]
Subject: Re: When does correlation imply causation?
> My favorite original example is
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Is it a fair interpretation of what you are saying to say that the
process of correlating phenomena needs to be distinguished from the
va
generally speaking, it is kind of difficult to muster sufficient evidence
that the amount of grade inflation that is observed ... within and across
schools or colleges ... is due to an increase in student ability
i find it difficult to believe that the average ability at a place like
harvard
i repeat ... the r value shows the extent to which a straight line (in a 2
variable problem) can pass through a scatterplot and, be close TO the data
points
in that sense, r is an index value for the extent to which a straight line
MODEL fits the data ...
knowing how the dots on the scatterpl
Just in case someone is interested in the Harvard instance
that I mentioned -- while you might get the article from a newsstand
or a friend --
On Sun, 02 Dec 2001 19:19:38 -0500, Rich Ulrich <[EMAIL PROTECTED]>
wrote:
[ ... ]
>
> Now, in the NY Times, just a week or two ago. The
> dean of und
Whether we can get causal inferences out of correlation and equations has
been a dispute between two camps:
For causation: Clark Glymour (Philosopher), Pearl (Computer scientist),
James Woodward (Philosopher)
Against: Nancy Cartwright (Economist and philosopher), David Freedman
(Mathematici
the reality of this is ... sometimes getting notes from other students is
helpful ... sometimes it is not ... there is no generalization one can make
about this
most student who NEED notes are not likely to ask people other than their
friends ... and, in doing so, probably know which of their
Jim Snow wrote:
>
> 1. George Marsaglia and Wal Wan Tsang published a paper dealing with
> your problem which gives an efficient procedure for all values of
> parameters. It is
>
> "The Monty Python Method for Generating Gamma Variables"
>
> in the Journal of Statistical S
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