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2002-02-18 Thread Á§
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Re: Which is faster? ziggurat or Monty Python (or maybe something else?)

2002-02-18 Thread Ian Buckner
We generate pairs of properly distributed Gaussian variables at down to 10nsec intervals, essential in the application. Speed can be an issue, particularly in real time situations. Ian Glen Barnett [EMAIL PROTECTED] wrote in message a4plof$p3s$[EMAIL PROTECTED]">news:a4plof$p3s$[EMAIL

How to find a PDF of a RV that varies on 2 other RVs??

2002-02-18 Thread Chia C Chong
Hi! I have 3 random variables i.e. Power (P), Delay (T) and Angle(A). The plot of P vs T is an exponential shape and the plot of P vs A is a Laplacian shape. Hence, this implies that the P values are varied with T and A. Hence, I could not just simply derived the PDF of P by just taking the

Re: Statistical Distributions

2002-02-18 Thread Herman Rubin
In article [EMAIL PROTECTED], Timothy W. Victor [EMAIL PROTECTED] wrote: I also think Alan's idea is sound. I start my students off with some binomial expansion theory. Giving not the formulas for the standard distributions but what types of problems result in these is good. But I believe it

Re: Newbie question

2002-02-18 Thread Robert J. MacG. Dawson
AP wrote: Hi all: I would appreciate your help in solving this question. calculate the standard deviation of a sample where the mean and standard deviation from the process are provided? E.g. Process mean = 150; standard deviation = 20. What is the SD for a sample of 25? The answer

Re: Question on random number generator

2002-02-18 Thread Robert J. MacG. Dawson
Linda wrote: I want to generate a series of random variables, X with exponential PDF with a given mean,MU value. However, I only want X to be in some specified lower and upper limit?? Say between 0 - 150 i.e. rejected anything outside this range Does anyone have any ideas how should I do

Re: Statistical Distributions

2002-02-18 Thread Dennis Roberts
not to disagree with alan but, my goal was to parallel what glass and stanley did and that is all ...seems like there are all kinds of distributions one might discuss AND, there may be more than one order that is acceptable most books of recent vintage (and g and s was 1970) don't even

Re: Statistical Distributions

2002-02-18 Thread Dennis Roberts
addendum if one manipulates n and p in a binomial and, gets to a point where a person would say (or we would say as the instructor) that what you see is very similar to ... and might even be approximated well by ... the nd ... this MEANS that the nd came first in the sense that one would

Re: Question on random number generator

2002-02-18 Thread Robert J. MacG. Dawson
Alan Miller wrote (six times): Linda wrote in message [EMAIL PROTECTED]... I want to generate a series of random variables, X with exponential PDF with a given mean,MU value. However, I only want X to be in some specified lower and upper limit?? Say between 0 - 150 i.e. rejected anything

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

2002-02-18 Thread Dennis Roberts
At 09:50 AM 2/18/02 +, Ian Buckner wrote: We generate pairs of properly distributed Gaussian variables at down to 10nsec intervals, essential in the application. Speed can be an issue, particularly in real time situations. Ian wow ... how our perspectives have changed! back in grad school,

covariates !!

2002-02-18 Thread jan plessers
Hello, I did a likert on 2 groups, a Mann-whitney showed that ther was a significant difference between the 2 groups. The next thing I did were some univariate statisics between the covariates and I found some significant differences between the covariates (ex. age sign. differs between the 2

Numerical recipes in statistics ???

2002-02-18 Thread The Truth
Are there any Numerical Recipes like textbook on statistics and probability ? Just wondering.. Thanks. = Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are

Re: Numerical recipes in statistics ???

2002-02-18 Thread Dennis Roberts
what is it you wanted to cook? At 01:35 PM 2/18/02 -0800, The Truth wrote: Are there any Numerical Recipes like textbook on statistics and probability ? Just wondering.. Thanks. = Instructions for joining and leaving this list,

Re: Statistical Distributions

2002-02-18 Thread Alan McLean
Hi Dennis, Dennis Roberts wrote: not to disagree with alan but, my goal was to parallel what glass and stanley did and that is all ...seems like there are all kinds of distributions one might discuss AND, there may be more than one order that is acceptable Sure, I realised that your goal

Re: Numerical recipes in statistics ???

2002-02-18 Thread Timo Salmi
The Truth [EMAIL PROTECTED] wrote: Are there any Numerical Recipes like textbook on statistics and probability ? I am baffled. Numerical Recipes partly is a book on statistics and probability. Incidentally: 303778 May 2 1991 ftp://garbo.uwasa.fi/pc/turbopas/nrpas13.zip nrpas13.zip Numerical

Re: can multicollinearity force a correlation?

2002-02-18 Thread Wuzzy
http://www.accessv.com/~joemende/insulin2.gif Appologies, i also forgot to divide the KCAL in food by the 31 as this represents kcal. It seems to me logical to advise decreasing food intake and increasing physical activity to improve insulin sensitivity. I would probably avoid reporting the

Re: can multicollinearity force a correlation?

2002-02-18 Thread Wuzzy
You should take note that R^2 is *not* a very good measure of 'effect size.' Hi Rich, you asked to see my data, i've posted the visual at the following location http://www.accessv.com/~joemende/insulin2.gif note that the r^2 is low despite the fact that it agrees with common sense: Insulin

odds vs probabilities

2002-02-18 Thread Brad Branford
hi, I'd appreciate an intuitive explanation of the difference between odds and probabilities. thanks. brad = Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are

Re: Numerical recipes in statistics ???

2002-02-18 Thread Glen Barnett
The Truth wrote: Are there any Numerical Recipes like textbook on statistics and probability ? Just wondering.. What do you mean, a book with algorithms for statistics and probability or a handbook/cookbook list of techniques with some basic explanation? Glen

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

2002-02-18 Thread Glen Barnett
Ian Buckner wrote: We generate pairs of properly distributed Gaussian variables at down to 10nsec intervals, essential in the application. Speed can be an issue, particularly in real time situations. Generated on what? (On a fast enough machine, even clunky old Box-Muller can probably give

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2002-02-18 Thread ì÷
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Re: Numerical recipes in statistics ???

2002-02-18 Thread Jay Warner
Abramowitz, Milton and Stegun, Irene A. ,Eds., Handbook of Mathematical Functions with Formulas, Graphs and Mathematical Tables, U. S. Gov't. Printing Office, Wash. DC Nat. Bureau of Standards., Applied Math Series 55 1964 ASQ has a couple 100 most valuable statistical equations or some such

Re: Numerical recipes in statistics ???

2002-02-18 Thread pirx
The Truth [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Are there any Numerical Recipes like textbook on statistics and probability ? Just wondering.. Thanks. I think one of S-plus manuals, 'statistic with S-plus' comes close in spirit, though without

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2002-02-18 Thread ll
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Re: can multicollinearity force a correlation?

2002-02-18 Thread Juha Puranen
Wuzzy wrote: http://www.accessv.com/~joemende/insulin2.gif Appologies, i also forgot to divide the KCAL in food by the 31 as this represents kcal. It seems to me logical to advise decreasing food intake and increasing physical activity to improve insulin sensitivity. I would probably

Re: odds vs probabilities

2002-02-18 Thread Kenmlin
Odd is defined to be P(event) --- 1- P(event) So if P(event) is 0.50, then the odd is 1 to 1. If P(event) is 0.75, then the odd is 3 to 1 since 0.75 is three times as large as 1 - 0.75 = 0.25. Given one of odds or probabilities, you can always derive the other. Ken