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

Thanks for the enlightenment, George. I misinterpreted what was said in Numerical Recipes, where it starts by referring to the Box-Muller method, then gives your algorithm without any intermediate referral. Hence I had always thought of this method as being B-M. Hey, I learnt something new, can

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Re: Question on CDF

Bob [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... [EMAIL PROTECTED] (Linda) wrote in message news:[EMAIL PROTECTED]... Hi! If I plot CDF of a sample data and this CDF looks like a straight line cross through 0. What does this implies?? Normally, CDF

Re: Question on CDF

[EMAIL PROTECTED] (Linda) wrote in message news:[EMAIL PROTECTED]... Hi! If I plot CDF of a sample data and this CDF looks like a straight line cross through 0. What does this implies?? Normally, CDF will not look like a straight line but sth like a S2 shape, isn't?? Linda A straight

Re: garch residuals

I would fit the data with various (r,p) arma models with the the desired garch assumption on the evolution of the variance and consider both the likelihood ratios and autocorrelation of the standardized residuals to determine the best model to fit the data. I have code for this if you want

Re: Question on CDF

On Fri, 22 Feb 2002 08:55:42 +1100, Glen Barnett [EMAIL PROTECTED] wrote: Bob [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... A straight line CDF would imply the data is uniformly distributed, that is, the probability of one event is the same as the probability

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

On Wed, 20 Feb 2002 22:21:38 -, Chia C Chong [EMAIL PROTECTED] wrote: [snip, various discussion before] I have an example of data of 2 RVs. When I tested the correlation between them, by simply find the correlation coefficient, it shows that the correlation coefficient is so small and

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Burn your own DVD

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Re: Probabilities

In article [EMAIL PROTECTED], Zachary Agatstein [EMAIL PROTECTED] wrote: Can you help me solve this problem: There are 8 baskets and 4 apples. Thrown at random, 3 of the 4 apples can go to any basket. The 4th apple, however, can only be thrown into baskets 1 through 4. What is the

RE: Chi-square chart in Excel

-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ronny Richardson Sent: Wednesday, February 20, 2002 7:29 PM To: [EMAIL PROTECTED] Subject: Chi-square chart in Excel Can anyone tell me how to produce a chart of the chi-square distribution in Excel? (I

Re: double exponential smoothing

Yvette wrote: Prediction Model using double exponential smoothing to estimate the linear trend in prices (as originally reported) and extending the trend to future years. The base period is about 8-10 years and a smoothing constant needs to be used to make the trend fairly responsive to

RE: Chi-square chart in Excel

sure is easy in minitab ... one can draw a very nice curve (it's easy but, hard to post here) but, to make a distribution easy for viewing we can MTB rand 10 c1; generated 10 values from SUBC chis 4. a chi square distribution with 4 degrees of freedom MTB dotp c1 Dotplot: C1

Re: Efficient convergence method

OK. You have a case where you sample from a 'population' of times from situation A a number of times, and from Situation B a number of times. Maybe C, D, etc. too. To compare 2 of these babies, use a t test. Keep sample size (n's of each) about equal, and go for it. Student 't' test is