Looking for some datasets

2002-01-04 Thread Michael Joner
The new semester has started and one of my first assignments has been to find some datasets that I'd be interested in evaluating during some of my classes. I spent some time searching the Internet for some interesting data. The data available on StatLib is not exactly what I'd prefer to study (a

RE: Excel2000- the same errors in stat. computations and graphics

2002-01-04 Thread David Heiser
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Shareef Siddeek Sent: Friday, January 04, 2002 1:22 PM To: [EMAIL PROTECTED] Subject: Excel2000- the same errors in stat. computations and graphics Happy new year to all. I frequently use Excel2000 for

Re: Question on 2-D joint distribution...

2002-01-04 Thread MathCraft Consulting
"Chia C Chong" <[EMAIL PROTECTED]> wrote in message a145qk$qfq$[EMAIL PROTECTED]">news:a145qk$qfq$[EMAIL PROTECTED]... > Hi! > > I have a series of observations of 2 random variables (say X and Y) from my > measurement data. These 2 RVs are not independent and hence f(X,Y) ~= > f(X)f(Y). Hence, I

Re: Empirical data Fitting

2002-01-04 Thread Grod
All three of your models: Exponential, Gamma and Weibull are of the form a*X^s where X is Gamma with n degrees of freedom and s and a are additional unknown parameters. For n=s=1 we have exponential. For s=1 we have gamma. For n=1 we have Weibull. Thus fit a*X^s and use the likelihood ratio

Re: Is there a problem with this kind of comparison?

2002-01-04 Thread Rich Ulrich
On 3 Jan 2002 20:17:48 -0800, [EMAIL PROTECTED] (Lucas Wells) wrote: [ snip, detail ] > > Now, I look at these percentages and I think to myself, 'They're > percentages of a whole. If one goes up, then another must fall. It > doesn't seem to make sense to examine them as if they are measures >

Excel2000- the same errors in stat. computations and graphics

2002-01-04 Thread Shareef Siddeek
Happy new year to all. I frequently use Excel2000 for graphic presentation, spreadsheet maths, simple nonlinear model fitting (using the Excel solver) with one or two parameters, and simulations. I thought Excel2000 corrected those errors found in the analysis tool pack and other in-built comput

Re: Is there a problem with this kind of comparison?

2002-01-04 Thread Robert J. MacG. Dawson
Lucas Wells wrote: > So, what I often see, then is: > > Orders (note: presented as Aug, Sep, Oct): > > Orders Issue: 1, 9000, 9500 > Orders With Errors: 2000, 2500, 2250 > % Orders With Errors: 20%, 27.78%, 23.68% > > Fields With Errors: > > Name Field: 750, 1000, 1100 > Address Field: 7

Question on 2-D joint distribution...

2002-01-04 Thread Chia C Chong
Hi! I have a series of observations of 2 random variables (say X and Y) from my measurement data. These 2 RVs are not independent and hence f(X,Y) ~= f(X)f(Y). Hence, I can't investigate f(X) and f(Y) separately. I tried to plot the 2-D kernel density estimates of these 2 RVs and from the it look