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Re: Which is faster? ziggurat or Monty Python (or maybe something else?)

The Box-Muller algorithm rejects roughly 22.5% of the generated points. I'm not aware of any bound on the number of consecutive rejections, other than a statistical one, hence my statement. I would welcome correction if this is not the case. Regards Ian Radford Neal [EMAIL PROTECTED] wrote

Correlations-statistics

Hi, I have calculated correlation coefficients between sets of parameters (A) and (B) and beween (A) and (C). Now I would like to determine the correlation between (A) and (B combined with C). How can I combine the two parameters (B) and (C), what kind of statistical method has to be applied?

Efficient convergence method

Hi, I am writing a computer simulation, and I really would appreciate some advice about statistics side of things! Each simulation run has fixed settings, but there is some randomness involved (e.g. start position). As a result, each simulation scenario needs to be run until the universal mean

Efficient convergence method

Hi, I am writing a computer simulation, and I really would appreciate some advice about statistics side of things! Each simulation run has fixed settings, but there is some randomness involved (e.g. start position). As a result, each simulation scenario needs to be run until the universal mean

Re: Numerical recipes in statistics ???

I do not think this will satisfy on its own but it seems a good starting point. SPSS has up on its web pages the statistical algorithms for many of its procedures: http://www.spss.com/tech/stat/algorithms.htm As these are not the computer algorithmns (at least I hope not) I think you will

Re: Which is faster? ziggurat or Monty Python (or maybe something else?)

Ian Buckner [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... The Box-Muller algorithm rejects roughly 22.5% of the generated points. I'm not aware of any bound on the number of consecutive rejections, other than a statistical one, hence my statement. I would

Re: Question on random number generator

Herman Rubin wrote: ExpVar = -ln(UnifVar); It is not a good method in the tails, and is much too slow. If I recall correctly, transcendental operations on a Pentium require only a couple hundred clock cycles and can usually be optimized to take place during other

Re: Correlations-statistics

well, one simple way would be to add B and C ... then correlate with A if these are radically different scales, convert to z scores first At 02:05 AM 2/20/02 -0800, Holger Boehm wrote: Hi, I have calculated correlation coefficients between sets of parameters (A) and (B) and beween (A) and

Normalization procedures

Hello everybody, Has anybody heard of the Bell-Doksum test? If so could you please give me a reference or a short descriptiion of it. Some one mentioned it to me and it's driving me crazy not to be able to find any info either on the net or in my references. Best Niko Tiliopoulos

Re: Evaluation of skating

Next question: How much does Rasch analysis depend upon the evaluators being ignorant that the method will be used? In other words, can (A) one Rasch-aware judge (B) a minority of Rasch-aware judges (C) a majority of Rasch-aware judges (but not the

How to test whether f(X,Y)=f(X)f(Y) is true??

Hi! I have some experimental data collected and can be grouped into 2 variables, X and Y. One is the dependent variable (Y) and the other is an independent variable (X). What test shall I made to check whether there can be expressed as independent or not?? Thanks.. Linda

Re: Normalization procedures

?? It is well known. Haven't you checked the Combined Index to Statistics, or even looked in The Encyclopedia of Statistical Sciences? Niko Tiliopoulos wrote: Hello everybody, Has anybody heard of the Bell-Doksum test? If so could you please give me a reference or a short descriptiion of

SPC control limits

Hi all, hope this is the right place. i was just wondering what you should do when you establish some control limits but some of the data points you've just used are outside of the limits you just established? should you write them off as bad, leave them or go back and see/fix the problem?

What is an experiment ?

Hi, I was reading a definition of experiment in science to be used in a lecture and the use of treatments and controls are an important feature of an experiment but my doubt is... is it possible to plan an experiment without a control and call this as an experiment ? For example, in a

Re: What is an experiment ?

At 03:59 PM 2/20/02 -0300, Voltolini wrote: Hi, I was reading a definition of experiment in science to be used in a lecture and the use of treatments and controls are an important feature of an experiment but my doubt is... is it possible to plan an experiment without a control and call

Re: How to test whether f(X,Y)=f(X)f(Y) is true??

You can start with checking if they are correlated. It's simpler to do. If you find that they are correlated then you have the answer to your question. If you find that they are uncorrelated and you have a reason to believe that they may be not independent anyway then you can look for more

Re: Efficient convergence method

the real question is, 'how much accuracy (precision, variance) is suitable?' If you were to repeat the simulation run (i.e., a test) a total of n times, then you could say that the true mean elapsed time was x-bar +/- (certain amount), with say 95% confidence. That is, if you were to then

Re: Correlations-statistics

[EMAIL PROTECTED] (Holger Boehm) wrote in message news:[EMAIL PROTECTED]... Hi, I have calculated correlation coefficients between sets of parameters (A) and (B) and beween (A) and (C). Now I would like to determine the correlation between (A) and (B combined with C). How can I combine

Re: SPC control limits

On 20 Feb 2002 08:50:19 -0800, [EMAIL PROTECTED] (MrTequila) wrote: Hi all, hope this is the right place. i was just wondering what you should do when you establish some control limits but some of the data points you've just used are outside of the limits you just established? should

Re: How to test whether f(X,Y)=f(X)f(Y) is true??

Vadim and Oxana Marmer [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... You can start with checking if they are correlated. It's simpler to do. If you find that they are correlated then you have the answer to your question. If you find that they are

Re: can multicollinearity force a correlation?

My tentative conclusion is that your 2% effect really is a small one; it should be difficult to discern among likely artifacts; and therefore, it is hardly worth mentioning I agree to me it makes sense as well: fasting insulin should have more to do with error and genetics than food

What is an experiment ?

I think also that an experiment is the human attempt to make sense out of the chaotic world: the method is you assume chaos, H0 and then disprove it.. so you don't need controls because the experiment can be run to prove maybe that the equation for velocity is valid.. (validation experiment)..

Re: How to test whether f(X,Y)=f(X)f(Y) is true??

On Wed, 20 Feb 2002 19:30:19 -, Chia C Chong [EMAIL PROTECTED] wrote: Vadim and Oxana Marmer [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... You can start with checking if they are correlated. It's simpler to do. If you find that they are correlated

Re: What is an experiment ?

Voltolini wrote: Hi, I was reading a definition of experiment in science to be used in a lecture and the use of treatments and controls are an important feature of an experiment but my doubt is... is it possible to plan an experiment without a control and call this as an

Re: What is an experiment ?

Voltolini wrote: Hi, I was reading a definition of experiment in science to be used in a lecture and the use of treatments and controls are an important feature of an experiment but my doubt is... is it possible to plan an experiment without a control and call this as an

Re: Numerical recipes in statistics ???

[EMAIL PROTECTED] (The Truth) wrote: I suppose I should have been more clear with my question. What I essentially require is a textbook which presents algorithms like Monte Carlo, Principal Component Analysis, Clustering methods, MANOVA/MANACOVA methods etc. and provides source code (in C ,

Re: How to test whether f(X,Y)=f(X)f(Y) is true??

Rich Ulrich [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... On Wed, 20 Feb 2002 19:30:19 -, Chia C Chong [EMAIL PROTECTED] wrote: Vadim and Oxana Marmer [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... You can start

Re: How to test whether f(X,Y)=f(X)f(Y) is true??

Linda [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hi! I have some experimental data collected and can be grouped into 2 variables, X and Y. One is the dependent variable (Y) and the other is an independent variable (X). What test shall I made to check

Re: Chi-square chart in Excel

Ronny Richardson wrote: Can anyone tell me how to produce a chart of the chi-square distribution in Excel? (I know how to find chi-square values but not how to turn those into a chart of the chi-square curve.) Ronny Richardson

Convert VHS tapes to DVD

Title: DVD Copy Utility Copy Burn DVD and VHS with CD Burner Also Playstation2 dreamcast !!! Why Spend upwards of $4000 on a DVD Burner when you could buy a software that will do the exact

Re: Normalization procedures

Niko Tiliopoulos wrote: Hello everybody, Has anybody heard of the Bell-Doksum test? IIRC it's like a Wilcoxon 2-sample test, except that the ranks are transformed to normal scores. If that's the right test, it has ARE 1 vs the t-test (it has good power for small deviations), but as you