Re: Need to evaluate difference between two R's

range" in hopes that it might be useful. -- Joe ***** Joe Ward Health Careers High School 167 East Arrowhead Dr 4646 Hamilton Wolfe San Antonio, TX 78228-2402 San Antonio,

Re: Prediction Model Question

at 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 * San Antonio, TX 78228-240

Re: teaching statistical methods by rules?

) Example: 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 ********

Re: Looking for text on resampling...

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 | nothing

Re: adjusting marks; W. Edwards Deming

-- Perhaps the unidentified writer is afrustrated product of "Non-mastery" Spelling Education and is intentionally (or unintentionally) showing the results. See BOLD items below. -- Joe ******** * Joe Ward Health Careers H

Re: ANN vs. nonlinear regression: forecasting

hing. Compare the PREDICTIVE accuracy/costs/etc.of various approaches. You may wish to include RESAMPLING/BOOTSTRAP/CROSS-VALIDATION in your research. The proof of the "best" is how well it PREDICTS I will be interested in what you learn. -- Joe ***

Re: Linear Regression with known intercept (Long Message)

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 regression

Re: Howto interpret interactions in an ANOVA

s. 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 * J

Fw: other uses for Minitab

lane seems tobe more appealing than taking partial derivatives. Connecting "perpendicularity" to"orthogonality" seems to work well.-- Joe**** * Joe Ward Health Careers High School ** 167 East Arro

Re: Repeated measures

answer. Be careful -- especially if theremay be "missing cells". :-) --Joe ******** * Joe Ward Health Careers High School ** 167 East Arrowhead Dr 4646 Hamilton Wolfe ** San Antonio, TX 78228-2402 San Antonio, TX

Re: When *must* use weighted LS?

n. -- 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: 210-617-5400 ** Fax: 210-433-2828 Fax: 210-617-5423 ** [EMAIL PROTECTED] ** http://www.ijoa.org/joeward/ward

Re: Why do we use and teach z?

ur 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 **

Re: Looking for text on resampling...

Scott -- Peter Bruce should be able to give us the latest "word". -- Joe ******** * Joe Ward Health Careers High School ** 167 East Arrowhead Dr 4646 Hamilton Wolfe ** San Antonio, TX 78228-2402 San Antonio

Re: Matrix multiplication

his 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 Health Careers High School ** 167 East Arro

Reference for regression discontinuity

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 East Arrowhead Dr 4646 Hamilton Wolfe ** San

Re: hyp testing

e? I imagine we will get some suggestions from our readers! :-) -- Joe **** * Joe Ward Health Careers High School * * 167 East Arrowhead Dr 4646 Hamilton Wolfe* * San

Re: linear model or interactive model?

onal 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 ********

Re: hyp testing -Reply

20 people who were Invertebrate Paleontologists. -- Joe * Joe Ward Health Careers High School * * 167 East Arrowhead Dr 4646 Hamilton Wolfe* * San Antonio, TX 78228

STATISTICS AT ISEF2000- International Science Engineering Fair -- Detroit May 7-13 --Summer Workshop in San Antonio

. --- Joe ******** * Joe Ward Health Careers High School * * 167 East Arrowhead Dr 4646 Hamilton Wolfe* * San Antonio, TX 78228-2402San Antonio, TX 78229 * * Phone: 21

Re: R sq vs r sq

ce of 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 ****

Re: R sq vs r sq

o 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 Dr

Re: Inequalities constrains on the coefficients

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

Re: MANOVA

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 * Fax: 210-433-282

Re: Beginner requests for help on ANOVA and T-tests (n SYSTAT97 --CAUTION)

uently 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 *

Re: Stupid question on relationship of r and t

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)=

Re: Novice questions about regression analysis.

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 Health C

Re: regression books?

://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

Re: Math Education of Mathematics Teachers

, 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 78228-2402

Re: How can I analyze split-design by SPSS v9.0?

R that 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 Antonio, J

Re: cluster

Anderberg, M.R. (1973) "Cluster Analysis for Applications" New York, Academic Press. --- Joe ******** Joe Ward.Health Careers High School 167 East Arrowhead Dr.

Re: What is today's Hogg Craig?

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 Craig? joe, HOGG AN

Re: How many Olympic Medals should Great Britain have won?

FUL MEANING? --Joe ********Joe Ward.Health Careers High School167 East Arrowhead Dr4646 Hamilton Wolfe San Antonio, TX 78228-2402...San Antonio, TX 78229Phone: 210-433-6575...Phone: 210-617-54

Re: How many Olympic Medals should Great Britain have won?

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 -

Re: How to Pool Slopes

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 Arrowhead Dr

Independent-Dependent Variable Discussion--Inverse Estimation

" 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 OF MEASUREMENT&q

[ap-stat] Independent-Dependent Variable Discussion--Inverse Estimation

" 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 OF MEASUREMENT&q

Re: 2 factor ANOVA with empty cells

ation from a small study that might have missing cells "strategically located". - Joe **** Joe Ward.Health Careers High School 167 East Arrowhead Dr

Re: [ap-stat] revote and Accuracy and Design of Voting Forms

ke work." --Thomas Edison === Joe Ward replied to Bob Hayden === Hey, Bob -- THAT really brought some hearty chuckles to Bettie and I. -- Joe ******** Joe Ward.Health

Re: [ap-stat] RE: election proposal

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 East

Re: Help needed ... :-(

Well said, Bob -- -- Joe Joe Ward.Health Careers High School 167 East Arrowhead Dr4646 Hamilton Wolfe San Antonio, TX 78228-2402...San Antonio, TX

[ap-stat] RE: election proposal

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 East

Re: [ap-stat] Textbook for regular statistics vs. AP Statistics

tes, 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 McGraw Hill for the regular statistics class. Any comments would be greatly ap

Re: Statistical penalties for sequential analyses

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

Re: Re: topic?

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

Re: adjusted r-square

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 is

Re: cite for using linear regression instead of logistic regression

David -- Logistic Regression is more appealing to some folks since it maps the Predicted values into the range 0-1. If you do a least-squares regression predicting a 0-1 dependent variable, the predicted values may not be mapped into 0-1 (e.g. some predicted values may be 0 and some

Re: Student's t vs. z tests

Eric -- Good comment! Also, it is helpful to keep in mind that: t^2 (df2) = F(1,df2) -- 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/joeward