Re: Confidence region plots
carl lee wrote: Hello, there: I am looking for software or programs that has procedure for drawing confidence region for bivariate cases, such as Youden Plot. I am not aware that the commonly used software such as Minitab, SPSS or SAS has procedures for this. If anyone has such a program or happens to know any resource, I would appreciate for such information. I am not sure what a Youden Plot is, however, bivariate normal confidence ellipses are not hard to draw in SAS, particularly if you use the procedure outlined in Jackson, J. E. (1991) "A User's Guide To Principal Components", John Wiley and Sons, New York, Chapter 15. -- Paige Miller Eastman Kodak Company [EMAIL PROTECTED] "It's nothing until I call it!" -- Bill Klem, NL Umpire "Those black-eyed peas tasted all right to me" -- Dixie Chicks = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
Re: Simple ? on standardized regression coeff.
On Tue, 17 Apr 2001 16:32:06 -0500, "d.u." [EMAIL PROTECTED] wrote: Hi, thanks for the reply. But is beta really just b/SD_b? In the standardized case, the X and Y variables are centered and scaled. If Rxx is the corr matrix [ ... ] No. b/SD_b is the t-test. Beta is b, after it is scaled by the SD of X and the SD of Y. Yes, beta is the b if X and Y are 'scaled' to unit normal. -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
PCA and factor analysis: when to use which
What is the basis for deciding when to use principal components analysis and when to use factor analysis. Could anyone describe a problem that illustrates the difference? = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =
