Julie --
I worked with Jack Schmid and John Leiman at the
Air Force Personnel and Training Research Center at Lackland
AFB.
I communicate with Jack Schmid occasionally but I'm not
sure where John Leiman is located now.
Perhaps Jack can point you to someone who can help.
-- Joe
- Original
Paolo --
Here comes my usual response to messages similar to yours:
Following the use of Regression/Linear Models:
1. State your research question in "NATURAL LANGUAGE" not
in terms of a "canned statistical name" that may or may not
be relevant to your question.
2. Create an ASSUMED MODEL that
If the least-squares regression algorithm does not
"REQUIRE THE NUMBER OF OBSERVATIONS TO EXCEED
THE NUMBER OF PREDICTORS, THEN THE REGRESSION
ALGORITHM COULD BE USED TO SOLVE A SYSTEM OF
SIMULTANEOUS EQUATIONS THAT WOULD HAVE
NO ERRORS."
Another "interesting" characteristic of Excel Regression i
his list and remarks about
> the problem of INAPPROPRIATE MESSAGES are available at
> http://jse.stat.ncsu.edu/
> =
>
=== Joe Ward Comments ==
Dennis --
You said it well!!!
I might add that a good approach is to develop
capabilities to create
Happy New Year --
Perhaps Laurie Snell will make a good start through the future
CHANCE issues.
-- Joe
Joe Ward
167 East Arrowhead Dr.
San Antonio, TX 78228-2402
Home phone: 210-433-6575
Home fax: 210-433-2828
Email: [EMAIL PROTECTED]
http://www.ijoa.org
Rich -
You might want to consider doing some Resampling (Cross-Validation,
Bootstrap)
as you continue through your analyses.
-- Joe
Joe Ward Health Careers High School
167 East Arrowhead
s
> site, which book? I am seriously considering the Yates, Moore and
> McCabe "The Practice of Statistics" for the AP class. I am
> considering either Moore's "Basic Practice of Statistice" or the
> "Elementary Statistics" book published by McGr
Does anyone know WHY so many states DON'T DO IT THIS WAY?
Perhaps the Political Science/History folks can comment.
-- Joe
****
Joe Ward.Health Careers High School
167
Well said, Bob --
-- Joe
Joe Ward.Health Careers High School
167 East Arrowhead Dr4646 Hamilton Wolfe
San Antonio, TX 78228-2402...San Antonio, TX
Does anyone know WHY so many states DON'T DO IT THIS WAY?
Perhaps the Political Science/History folks can comment.
-- Joe
****
Joe Ward.Health Careers High School
167
t;
> > > The State of New Hampshire takes no responsibility for what this map
> > > looks like if you are not using a fixed-width font such as Courier.
> > >
> > > "Opportunity
t;
> > > The State of New Hampshire takes no responsibility for what this map
> > > looks like if you are not using a fixed-width font such as Courier.
> > >
> > > "Opportunity
ation from
a small study that might have missing cells "strategically located".
- Joe
****
Joe Ward.Health Careers High School
167 East Arrowhead Dr
ot;independent" variable and temperature as the "dependent"
> variable."
I have inserted some comments below:
=== Joe Ward writes ==
In the ancient past (1950s), for calibration studies --
Let
Y be a reading from a measuring instrument, SUBJECT TO "ERRORS O
ot;independent" variable and temperature as the "dependent"
> variable."
I have inserted some comments below:
=== Joe Ward writes ==
In the ancient past (1950s), for calibration studies --
Let
Y be a reading from a measuring instrument, SUBJECT TO "ERRORS O
Hi, Stan --
I've inserted a reply at the end of your message. Let me know
how things turn out.
-- Joe
****
Joe Ward.Health Careers High School
167 East Arrowhe
Hi, Paige --
Good comments about "There are so many
different factors..."
"To say that half the observations should
have positive errors and halfshould have negative errors is to confuse
median with mean."
I used the word ABOUT intentionally to
distinguish from EXACTLY.
--Joe
---
ATIONALLY USEFUL
MEANING?
--Joe
********Joe
Ward.Health Careers High School167
East Arrowhead Dr4646 Hamilton
Wolfe
San Antonio, TX 78228-2402...San Antonio, TX 78229Phone:
210-4
Hi, Gary, Jerry et al --
Here is a message from Bob Hogg.
-- Joe
- Original Message -
From: "Robert V. Hogg" <[EMAIL PROTECTED]>
To: "Joe Ward" <[EMAIL PROTECTED]>
Sent: Friday, September 22, 2000 9:19 AM
Subject: Re: Fw: What is today's Hogg &
Anderberg, M.R. (1973) "Cluster Analysis for Applications" New York,
Academic Press.
--- Joe
********
Joe Ward.Health Careers High School
167 East Arrowhead Dr.
awing
sketches to understand statistics, but expect that tactic won't work with
these students. Has anyone found effective ways of presenting statistical
concepts to blind students?
Jay Thomas
-
BOB BOTTENBERG REPLIES TO J
at is available.
If you have time to take a look at the URL below, Slides 7 and 8 of the
PowerPoint presentation on "Using Calculators and Computers in Statistics" -
Laura Niland & Joe Ward, CAMT98 45th Annual Conference, San Antoni
Copies of
INTRODUCTION TO LINEAR MODELS by Ward and Jennings is
available by contacting:
Dr. Jimmy Mitchell
The Institute for Job and Occupational Analysis (IJOA)
10010 San Pedro, Suite 440, San Antonio, Texas 78216
(210) 349-8525 Fax: (210) 349-0168
[EMAIL PROTECTED]
Bottenberg, R.A., & Wa
ession 281, Thursday, Aug. 17 10:30 a.m. - 12:30.
-- Joe
****
****
Joe Ward.Health Careers High School
167 East Arrowhead Dr4646 Hamilton Wolfe
San Antonio, TX
://www.amstat.org/publications/jse/v4n3/ward.html
-- Joe
Joe Ward.Health Careers High School
167 East Arrowhead Dr4646 Hamilton Wolfe
San Antonio, TX 78228
OUTSIDE your RANGE OF INTEREST.
-- Joe
********
Joe Ward.Health Careers High School
167 East Arrowhead Dr4646 Hamilton Wolfe
San Antonio, TX 78228-2402...San Antonio, TX 78229
Phone: 210-433-6575.
concerned about
RESTRICTION OF RANGE it became obvious to me that the correlation
coefficient should be used with EXTREME CAUTION.
-- Joe
Joe Ward.Health Careers High School
167
aged COVARIANCE algorithms" still
assume NO INTERACTION? Does SAS (or other stat packages) warn us
when there is a "missing cell" in an ANOVA-LIKE GLM computation?
-- Joe
******
Joe Ward
u may not
"pass".
-- Joe
******
Joe WardHealth Careers High School
167 East Arrowhead Dr. 4646 Hamilton Wolfe
San Antonio, TX 78228-2402 San Antonio, TX 78229
Phone: 210-433-6575Pho
Jason --
t^2 = r^2*(n-2)
---
(1-r^2)
is a special case of the more general case of using R^2 to compute
the F statistic in a Prediction/Regression/Linear Models approach to
research studies.
Letting
R^2(Assumed) = R^2 for the ASSUMED MODEL
R^2(Restricted)= R^2
vestigate the INTERACTION between
TEACHER and PRIOR PERFORMANCE.
More later.
-- Joe
******
Joe Ward Health Careers High School
167 East Arrowhead Dr. 4646 Hamilton Wolfe
San Anto
IS CORRECT.
I'm sure that previous users must have mentioned this to the EXCEL
REGRESSION folks.
Perhaps no one cares.
-- Joe
********
* Joe Ward
* 167 East Arrowhead Dr.
* San Antonio, TX 78228-2402
* Phone: 210-433-6575
* Fax: 210-433-2828
*
frequently mention:
"Using the statistical routines in Excel can be risky."
Of course, ALL statistical packages should be used with caution.
We have not had time to check on the Excel2000 to find out if it is still
has the
same problem.
Keep in touch.
-- JHW
If the 'ZERO' or 'DOT' means that you have some missing cells then
that is a good time to "CREATE YOUR OWN MODEL".
-- Joe
********
* Joe Ward
* 167 East Arrowhead Dr.
* San Antonio, TX 78228-2402
* Phone: 210-433-6575
* F
I asked Lee Wilkinson how this is done in SYSTAT.
Here is his reply.
-- Joe
* Joe Ward
* 167 East Arrowhead Dr.
* San Antonio, TX 78228-2402
* Phone: 210-433-6575
* Fax: 210-433-2828
* Email: [EMAIL PROTECTED]
* http://www.ijoa.org
Lee Wilkinson indicates how this is done in SYSTAT.
--- Joe
-Original Message-
From: Wilkinson, Leland <[EMAIL PROTECTED]>
To: 'Joe Ward' <[EMAIL PROTECTED]>
Date: Thursday, June 08, 2000 9:34 AM
Subject: RE: Inequalities constrains on the coefficients
>Th
* Joe Ward Health Careers High School *
* 167 East Arrowhead Dr 4646 Hamilton Wolfe*
* San Antonio, TX 78228-2402San Antonio, TX 78229 *
* Phone: 210-433-6575
fusing.
| >
| >Cheers,
| >Bill Larson
| >Geneva, Switzerland
| >
| >- Original Message -
| >From: Joe Ward <[EMAIL PROTECTED]>
| >To: William J. Larson <[EMAIL PROTECTED]>; Paul Velleman
| ><[EMAIL PROTECTED]>
| >Cc: <[EMAIL PROTECTED]>
| >
EED to accomplish practical results -- leading to more enthusiasm for
statistics and data analysis.
Change is slow!!
:-)
-- Joe
********
* Joe Ward Health Careers High School *
* 167 East Arrowhead D
f Y
and X, but
LINEAR in the 3D space of Y,X and Z", then we might even cause more frustration. :-(
"COMMUNICATION" IS A PROBLEM EVERYWHERE!
DO WILLIAM AND PAUL HAVE THE SAME MEANING FOR "NONLINEAR"?
:-)
--- Joe
****
ration.
-- Joe
********
* Joe Ward Health Careers High School *
* 167 East Arrowhead Dr 4646 Hamilton Wolfe*
* San Antonio, TX 78228-2402San Antonio, TX 78229 *
* Phone: 210-433-6575
iscuss details.
--- Joe
****
* Joe Ward Health Careers High School *
* 167 East Arrowhead Dr 4646 Hamilton Wolfe*
* San Antonio, TX 78228-2402San Antonio, TX 78229
time there were less than 20
people who were Invertebrate Paleontologists.
-- Joe
****
* Joe Ward Health Careers High School *
* 167 East Arrowhead Dr 4646 Hamilton Wolfe
Good message, Alan --
As you indicate, the model is LINEAR in the coefficients b0, b1, b2, b3
and in the 4-D space of y,x1,x2,x3(i.e., x1*x2) the function lies in a PLANE.
But in the 3-D space of y,x1,x2 the surface is TWISTED ( not in
a PLANE).
-- Joe
- Original Message -
From: Alan Mc
l space of Y-X-X^2. With 3-D displays that we
can rotate as we would like, it is enlightening to observe that the CURVE seen in the
two-dimensional
space lies in a PLANE in the three-dimensional space of Y-X-X^2.
-- Joe
********
= c1 X1 + c2 X2,
| where c1 and c2 are constant. I doubt it is not a pure interactive form,
| since X.1 and X.2 are dependent. Sorry for this stupid question.
|
| Wen-Feng
|
==== Joe Ward writes|
===
Wen-Feng---
Your
t; outcome? I imagine we
will get
some suggestions from our readers!
:-)
-- Joe
********
* Joe Ward Health Careers High School *
* 167 East Arrowhead Dr 4646 Hamilton Wolfe
dels
appropriate to the
research questions of interest, many
seemingly-unique problems
can be handled easily, e.g. Cubic
Splines.
-- Joe
* Joe
Ward
Health Careers High School ** 167
ts
This due to the different order of accumulation of
the sum of products of
numbers between 0 and 1.
Numerical analysts can have lots of challenging
problems.
-- Joe
********
* Joe
Ward
Hea
Scott --
Peter Bruce should be able to give us the
latest "word".
-- Joe
********
* Joe
Ward
Health Careers High School ** 167 East Arrowhead
Dr
4646 Hami
he exam might
want to give your students some power to use
Prediction/Regression/Linear Models
and Computers. They might be able to do some
useful data analysis and appreciate
your efforts!!
Well, that's enough from a "NON-INFLUENTIAL
OUTLIER".
-- Joe
.
-- Joe
********
* Joe
Ward
Health Careers High School ** 167 East Arrowhead
Dr
4646 Hamilton Wolfe ** San
Antonio, TX
78228-2402
San Antonio, TX 78229 ** Phone:
210-433-6575
Phone: 21
AdministrationUniversity of Illinois at Chicago601 S. Morgan
StreetChicago, IL 60607-7124www.uic.edu/~slsclove
Have fun!!
--Joe
****
* Joe
Ward
Health Careers High School ** 167 East Arrowhea
to answer.
Be careful -- especially if there may
be "missing cells".
:-)
--Joe
********
* Joe
Ward
Health Careers High School ** 167 East Arrowhead
Dr
4646 Ha
or hyper-plane seems tobe more appealing than taking partial
derivatives. Connecting "perpendicularity" to"orthogonality" seems
to work well. --
Joe********
* Joe
Ward
or hyper-plane seems tobe more appealing than taking partial
derivatives. Connecting "perpendicularity" to"orthogonality" seems
to work well. --
Joe********
* Joe
Ward
s with AVERAGES,
MEANS, GPAs. And the
"Missing Cells Problem?" is really not a
problem until the students are
told that some folks don't know what to do about
"Missing Cells".
Enough "preaching to the choir"!!
--Joe
**
Mark writes -
- Original Message - From: <[EMAIL PROTECTED]>To: <[EMAIL PROTECTED]>Sent:
Saturday, February 12, 2000 4:51 PMSubject: Linear Regression with known
intercept| Hi,| | If I want to find the least squares
estimator of the slope of a simple| linear regress
ll be interested in what you
learn.
-- Joe
********
* Joe
Ward
Health Careers High School ** 167 East Arrowhead
Dr
4646 Hamilton Wolfe ** San
Antonio, TX
78228-2402
San Antonio, TX 78229 ** Phone:
210-433-65
Good comment, Robert --
Perhaps the unidentified writer is
a frustrated product of "Non-mastery" Spelling Education
and is intentionally (or unintentionally) showing
the results.
See BOLD items below.
--
Joe
********
Scott --
Peter Bruce is the contact!!!
-- Joe
- Original Message -
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, February 06, 2000 12:08 PM
Subject: Looking for text on resampling...
| Our small college library has a collection of basic biostats texts but
| nothin
se who can
help.
-- Joe
********
* Joe
Ward
Health Careers High School ** 167 East Arrowhead
Dr
4646 Hamilton Wolfe ** San
Antonio, TX
78228-2402
San A
it should read "a2=0"
:-(
-- Joe
- Original Message -
From: Joe Ward <[EMAIL PROTECTED]>
To: bkamen <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Cc: APSTAT-L <[EMAIL PROTECTED]>
Sent: Tuesday, January 04, 2000 3:08 PM
Subject: Re: Correlation - Constraints on
, Ph.D., Director
[EMAIL PROTECTED]
10010 San Pedro, Suite 440, San Antonio, Texas 78216
(210) 349-8525 Fax: (210) 349-0168
--- Joe
* Joe Ward Health Careers High School *
* 167 East Arrow
educe the number of predictors,
then you should NOT use
factor scores but use regression
models.
-- Joe
********
* Joe
Ward
Health Careers High School ** 167 East Arrowhead
Dr
^^
Joe
********
* Joe Ward Health Careers High School *
* 167 East Arrowhead Dr 4646 Hamilton Wolfe *
* San Antonio, TX 78228-2402San Antonio, TX 78229 *
* Phone: 21
mple: The critical-value of t for probability of p = .05 at t(18) = 1.734
The critical-value of F for probability of p = .10 at F(1,18) =
(1.734)^2 = 3.01
:-)
-- Joe
********
nterested in seeing the models that your student develops to investigate
his/her OWN QUESTIONS OF INTEREST!!
:-)
-- Joe
**
* Joe Ward Health Careers High School
* 167 East Arrowhead Dr 4646 Hamilton Wolfe
--
| Donald F. Burrill [EMAIL PROTECTED]
| 348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED]
| MSC #29, Plymouth, NH 03264 603-535-2597
| 184 Nashua Road, Bed
ing a name to (1-r^2) then why not call
it the "coefficient of non-determination". But "one minus r square"
is about as easy to say as "coefficient of non-determination".
-- Joe
*
Joe Ward
RESTRICTED MODELS to HELP
make decisions about the questions of interest.
Hopefully, (Luv 2 muah 143) is being provided the opportunity to do the above!!
Reasonably talented high school students should be given to power to do this.
:-)
--- Joe
*
Joe
alue could be obtained?
|
| thanks
| --
| 208 Cedar Bldg., University Park, PA 16802
| AC 814-863-2401Email mailto:[EMAIL PROTECTED]
| WWW: http://roberts.ed.psu.edu/users/droberts/drober~1.htm
| FAX: AC 814-863-1002
JOE WARD COMMENTS ---
Hi, Denni
ategories?)
And on the other hand we may have "SCORES" on a 100-point scale.
but someone might desire to have some "LETTERS". So we may
Let 90-100 = A
80-89 = B
70-79 = C
60-69 = D
00-59 = F
:-)
-- Joe
**
C#29
|| | Plymouth, New Hampshire 03264 USA
|| * | Rural Route 1, Box 10
| /| Ashland, NH 03217-9702
| | ) (603) 968-9914 (home)
| L_/ [EMAIL PROTECTED]
| fax (603) 535-2943 (work)
|
- Joe Ward com
-making in the real world. However,
there are still some folks who are adjusting correlation
coefficients for "restriction of range" in hopes that it
might be useful.
-- Joe
*
Joe Ward Health Careers High
TROL IT -- MEASURE IT AND
PUT IT IN THE MODEL. In addition, if their future research leads to an interest in the
possible INTERACTION (a special term associated with question #3 above) between
attributes,
then the attributes MUST BE MEASURED AND INCLUDED IN THE MODEL.
And the sermon come
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