Re: p values

2001-01-31 Thread P.G.Hamer
> All IMHO, feedback appreciated. Dennis, Frequentist statistics, unlike Bayesian statistics, only allows a hypothesis to be true or false. Frequentist test figures quantify the test -- under repeated trials -- rather than the sample (or the population from which it came). So the p-values indic

Re: Comparison of statistical software

2001-01-24 Thread P.G.Hamer
Ken K. wrote: > Like I said, everyone has different needs, backgrounds, etc. > > The main point is to acquire the demos and try the software!! Pick the one > you like best for your needs. You may also want to look at the communities addressing similar problems to your own. They may well be produ

Re: MA MCAS statistical fallacy

2001-01-23 Thread P.G.Hamer
dennis roberts wrote: > there just is no good way to argue against the original choice C ... IN THE > CONTEXT OF THE STEM OF THE QUESTION I am reminded of the joke article that contains many `pollitically incorrect' answers to the exam question "given a barometer how do you measure the hight of

Re: OT: psychological test for recruitment in Statistics

2001-01-05 Thread P.G.Hamer
Rich Ulrich wrote: > Computers do better than experts in making medical > diagnoses when the correct answer has to be from a narrow set. I think that some of the early systems also were better than humans at identifying the possibility of unusual diagnoses. AFAIR it took the humans to reach a fi

Re: Florida votes and statistical errors

2000-12-13 Thread P.G.Hamer
[EMAIL PROTECTED] wrote: > Since the vote difference between Bush and Gore falls within the margin > of error for the counting process, declaring the winner is > mathematically indeterminable within any reasonable degree of > scientific confidence. > > Since we cannot know who has won, the Florid

Re: "reasonable probability"

2000-12-05 Thread P.G.Hamer
Fred Galvin wrote: > There is nothing *wrong* with "undervote" ballots. Voters are not > required to vote on every office and every question on the ballot. > Probably, *most* people who vote don't fill out their ballots > completely. Voters who choose not to vote for any of the candidates > for p

Re: recommendations for Markov Chain Monte Carlo book

2000-11-28 Thread P.G.Hamer
Bill Jefferys wrote: > For reversible jump MCMC on models with varying numbers of parameters, I > have found the paper by Dellaportas, Forster and Ntzoufras to be > unusually useful...Dellaportas P., Forster J.J., Ntzoufras I. (2000). On > Bayesian Model and Variable Selection Using MCMC. To app

Re: Mathematical symbols--compiled responses and thanks.

2000-11-23 Thread P.G.Hamer
Paul W. Jeffries wrote: > TeX and LaTeX > Some found these difficult to learn. > One Windows interface is WinTeX, http://www.tex-tools.de/main.html [La]Tex seemed to far from the original request's world for me to mention. However if it's a real option also take a look at LyX - a graphical fron

Re: NY Times on "statisticians' view" of election

2000-11-21 Thread P.G.Hamer
[EMAIL PROTECTED] wrote: > You could of course have the voters choose which people will be elected > from each party, instead of letting the parties rank their candidates > on a list. This is how it works in Finland. Sounds interesting. How many members of parliament are there in Finland? How m

Re: NY Times on "statisticians' view" of election

2000-11-21 Thread P.G.Hamer
Anon. wrote: > H > > > But do not rush to a proportional system. It can have very > > bad consequences, as can be seen from Israel and Italy, and > > which was the case in France until de Gaulle reformed the > > structure of the government. > > > It works fine in Scandinavia. The Swedish People

Re: NY Times on "statisticians' view" of election

2000-11-20 Thread P.G.Hamer
Thom Baguley wrote: > Herman Rubin wrote: > > The UK has effective disenfrachisement of most of the > > members of its Liberal party. Also, the US was definitely > > set up NOT to be "democratic"; the British democracy has > > greatly eroded the rights the people won in the Bill of > > Rights an

Re: Fundamental differences between Statistics and Data Mining?

2000-11-20 Thread P.G.Hamer
T.S. Lim wrote: > I'm attempting to compile an online list of the fundamental differences > between our field Statistics and Data Mining. Several online references > that touch on the topic include > >http://www-stat.stanford.edu/~jhf/ftp/dm-stat.ps >http://www.acm.org/sigkdd/explorations

Re: manual recount - of punched ballots

2000-11-16 Thread P.G.Hamer
Rich Ulrich wrote: > I don't think that ANY re-vote is pragmatically feasible. Agreed. > Anyway, ignoring the 19,000 double-punched ballots In an ideal world, a pragmatically defensible option would be to split the double-punched votes resulting from the poor [and illegal?] ballot paper desi

Re: NY Times on "statisticians' view" of election

2000-11-16 Thread P.G.Hamer
Herman Rubin wrote: > Those who voted for Bush > and so push harder on the punch to make sure that it > went all the way through. A related interpretation is that those who were voting Gore were less certain that they had chosen the right hole, so pressed less positively. [They would have be

Re: Any interest in a real problem?

2000-09-07 Thread P.G.Hamer
Tony Rizzo wrote: > Your observations are correct. But the solution that you mention does > not > apply to the problem that I describe. The technology is not lacking. > It is the understanding that is lacking, in management. > > So, my question remains. If the problem is that most managers and

Re: Modern Regression and Classification course- Palo Alto- corrected

2000-08-21 Thread P.G.Hamer
Alexander Tsyplakov wrote: > I have several questions. > > Is it possible to "give a detailed overview of statistical > models for regression and classification" in two-day course? > > What do you mean by "Modern Regression and Classification"? > May be it's better to call this "Some Methods in R

Re: likelihood

2000-08-17 Thread P.G.Hamer
David A. Heiser wrote: > I am going to reference Fisher as his views later on in life in the 1973 3rd > edition of "Statistical > Methods and Scientific Inference" > > "The Mathematical Likelihood assignable to every value of the unknown > parameter p supplies a zoning of the admissible range o

Re: Variance Smoothers

2000-08-10 Thread P.G.Hamer
You might want to look at AVAS (Additivity and Variance Stabilising Regression). As part of a regression process it finds transformations which may go a long way towards solving your problem. Peter > Eric Turkheimer schrieb: > > > > I am interested in whether there is a literature on variance

Re: how to automate numerical analysis?

2000-08-10 Thread P.G.Hamer
> <[EMAIL PROTECTED]> wrote in message 8lalui$655$[EMAIL PROTECTED]">news:8lalui$655$[EMAIL PROTECTED]... > SAS seems > > to be the only program that is flexible enough to run on unix and be > > automated. I would prefer a more simplistic approach as there is _a > > lot_ of overhead in startin

Re: likelihood

2000-08-09 Thread P.G.Hamer
David A. Heiser wrote: > First of all Fisher is a very ponderous writer, very difficult to find the > gold in the pile of ore. > Second, one needs to read Fisher's insight into > Bayes original work to understand Fisher's view of probability. Can you supply a reference? All Fisher's writings o

Re: literature on convenience sampling

2000-07-05 Thread P.G.Hamer
Susanne Muigg wrote: > Hi there, > > now I'm about to finish my thesis, but still looking for some literature > about the advantages and disadvantages of a (student) convenience sample, > which I had used. Unfortunately, I couldn't find anything, even if I've done > quite an extensive literature

Re: multivariate statistics.

2000-06-05 Thread P.G.Hamer
Neil W. Henry wrote: > A book that you might find useful is not a statistics book, and it is out > of print, but here is the title and author: > Casual groups of monkeys and men; stochastic models of elemental social > systems >by Joel E. Cohen 9 copies currently availlable via the exce

Re: statistics in the field of genetics

2000-05-16 Thread P.G.Hamer
Patrick Lee wrote: > Hello; > I am doing a general search for the types of statistical methodologies > specific to the field > of genetics. Does anyone know of any good texts,journals, or web pages > that would give > me this information? Thank you. You might try the newsgroup bionet.info-theory

Re: Benford's law and simulation

2000-05-15 Thread P.G.Hamer
DIAMOND Mark R wrote: > Background: Theodore Hill showed, in a paper published in Statistical > Science 1995, that if sequences of random variables $\{X\sb n\}$ are > selected at random in a scale (base) unbiased way, then the mantissa > distributions of the combined sample will converge to Benfo

Re: Self-Studying Statistics Book

2000-05-05 Thread P.G.Hamer
brianv wrote: > I finished two courses of statistics already. I am looking for a good book > that is easy to study by myself during the summer. The level would be after > the first two intro-stat classes, maybe like regression analyis... If > anyone has any suggestion, I really appreciate. >

Re: Quick Portable Statisitcs

2000-04-20 Thread P.G.Hamer
C., Bayard, Paschall, III wrote: > I am looking for a source of "portable staistics", i.e. techniques that > are easy to remember and use, that can be applied without a calculator > or software program or and do not need reference tables. > > Examples are: Tukey-Duckworth two sample test, and th

Re: Hypothesis testing and magic - episode 2

2000-04-20 Thread P.G.Hamer
Jerry Dallal wrote: > As Tukey has pointed out, the null hypothesis of no effect > is not that we think there is no effect, but we are uncertain > of the direction. > > I wish I knew more about Delany and its application. > One problem, pointed out by David Salsburg, is that a > substances that e

Re: bootstrap, jackknife & cross-validation with matlab

2000-04-14 Thread P.G.Hamer
T.S. Lim wrote: > In article <8d4f0o$g4$[EMAIL PROTECTED]>, [EMAIL PROTECTED] says... > > > >Hi everybody, > > > >I m looking for free Matlab programs wich perform bootstrap, jackknife & > >cross-validation, for neural netorks and regression (MLP). > >Does anybody can tell me where I can find it

Re: Exploratory data analysis

2000-04-03 Thread P.G.Hamer
Statistics Dept. Nat. Bk. Belgium wrote: > Hi, > > There is a book by Tukey > exploratory data analysis > very good but maybe not suitable for a 2000 research student A /much/ more readable overview is given in Data Analysis and Regression: A Second Course in Statistics Frederick Mosteller, John

Re: Sample size: way tooo big?

2000-03-22 Thread P.G.Hamer
DeLa wrote: > Well, I suppose that when the sample is too big almost every > relation will prove to be "significant". A lot of > pseudo-relations will occur. It will become difficult to detect > intermediate(1) variables or neutralise them because there will > be many candidates - if not all the

Re: Sample size: way tooo big?

2000-03-22 Thread P.G.Hamer
DeLa wrote: > I have been trying to explain to some co-workers that a sample > can be too big. > That is not very easy because it is contratictory to what > intuition says. > > Can someone point me to some good arguments or literature? > Or correct me if my assumption is wrong? I can see that hu

Re: Normal Random Numbers

1999-11-29 Thread P.G.Hamer
There is a neat `trick' to generate high-quality random normal/Gaussian numbers from pairs of unit random numbers. See http://www.ulib.org/webRoot/Books/Numerical_Recipes/ for a description of the algorithm. Peter

Re: Chernoff faces

1999-01-16 Thread P.G.Hamer
ALPHONSE AMEY wrote: > For Chernof Faces, see: > > Chernoff, H., (1973) "Using faces to represent points in K-dimensional space >graphically", > JASA, 68, 361-368. > > >>> Mike Wogan <[EMAIL PROTECTED]> 11/17 2:45 PM >>> > > > > What are Chernoff faces? The reference is well worth chasing up, a