Re: cluster analysis in one-dimensional circular space

2000-04-17 Thread Rich Strauss
dimensions, rather than one) and clustered, and also how distances are measured among observations in Kendall's shape spaces (e.g., Procrustes distances), so there's a well established literature. Rich Strauss At 05:32 PM 4/14/00 +0200, you wrote: Hi everybody. I face the problem of clustering

Re: differences between groups/treatments ?

2000-06-22 Thread Rich Strauss
ion models for prediction: shrinkage and regression to the mean (167-183) Copas J. Rich Strauss Dr Richard E Strauss Biological Sciences Texas Tech University Lubbock TX 79409-3131 Email: [EMAIL PROTECTED] Phone: 80

Re: Adjusting a Correlation Matrix

2000-07-06 Thread Rich Strauss
The eigen procedure successfully 'corrects' the matrix. Rich Strauss Dr Richard E Strauss Biological Sciences Texas Tech University Lubbock TX 79409-3131 Email: [EMAIL PROTECTED] Phone: 806-742-2719 Fax: 80

Re: Question

2000-10-30 Thread Rich Strauss
the variances of the original log-transformed data using Levene's test or equivalent. Rich Strauss At 07:56 AM 10/30/00 -0500, you wrote: Hi! My question is on a test to compare CVs. The CVs are computed using the same data but two different variance methods and I have to compare them. Been told

Problem on the probability of death

2001-01-16 Thread Rich Strauss
in the right direction? Thanks in advance. Rich Strauss Dr Richard E Strauss Biological Sciences Texas Tech University Lubbock TX 79409-3131 Email: [EMAIL PROTECTED] (formerly [EMAIL PROTECTED]) Phone: 806-742-2719 Fax: 806-742-2963

Nonrandomness of binary matrices

2001-07-23 Thread Rich Strauss
appreciate ideas about this. Thanks in advance. Rich Strauss = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =

Re: Nonrandomness of binary matrices

2001-07-25 Thread Rich Strauss
is holding up the analysis of the results from a much larger study. I've talked to statisticians on campus, with little progress, so basically I'm begging for help. Rich Strauss At 10:47 AM 7/25/01 -0400, you wrote: On 23 Jul 2001 14:22:58 -0700, [EMAIL PROTECTED] (Rich Strauss) wrote: Say I have

Re: diff in proportions

2001-11-16 Thread Rich Strauss
of the common mean, as Jerry Dallal suggested. I could pass on the details of my simulation if anyone is interested, but mostly I'd appreciate it if someone could repeat this simulation independently of mine to see whether it holds up. Rich Strauss

Fwd: Re: diff in proportions

2001-11-17 Thread Rich Strauss
Nov 2001, Rich Strauss wrote: I've just done some quick simulations in Matlab, constructing randomized null distributions of the t-statistic under both scenarious: (1) sample variances based on sample means vs. (2) variances about the pooled mean. Assuming I've done everything correctly

Re: N.Y. Times: Statistics, a Tool for Life, Is Getting Short Shrift

2001-11-28 Thread Rich Strauss
If the trend continues nationwide, this newspaper could someday report that an apparently alarming cluster of cancer cases has arisen in an innocuous normal distribution, and students will be able to explain to their parents what that means. The reporting of cancer clusters already happens on a

Re: N.Y. Times: Statistics, a Tool for Life, Is Getting Short Shrift

2001-11-29 Thread Rich Strauss
This has nothing to do with normal distributions, as Robert Dawson noted yesterday. The article I cited makes no mention of normal distributions, and I didn't mean to imply that it did. Rich Strauss At 04:29 AM 11/29/01 +, Jerry Dallal wrote: Rich Strauss [EMAIL PROTECTED] wrote

Re: Two sided test with the chi-square distribution?

2001-02-05 Thread Rich Strauss
Your point is well taken, and I didn't mean to imply dishonesty either -- the term "fudged" was a poor choice, but I meant it in the sense of manipulation or filtering, not necessarily conscious, and I mentioned that it was an assertion. Rich Strauss At 06:13 PM 2/5/01 -0500, you w

Re: Regression with repeated measures

2001-02-28 Thread Rich Strauss
autocorrelations to weight them in the regression. (The design was originally created to answer a very different question, which is how I got into this mess.) I hope that there's a single answer to both of our questions. Rich Strauss At 10:54 AM 2/28/01 -0600, Michael M. Granaas wrote: I have