why does everything have to be free???
but ... go here first ... http://members.aol.com/johnp71/javastat.html
scroll down to random number generators ...
one example is http://ebook.stat.ucla.edu/calculators/cdf/index.phtml
regular stat software does these sorts of things easily ... in minitab for
example ... let's say i wanted to generate a sample of n=100 from a chis
dist. with 3 degrees of freedom
����� 9/20/01 5:50:36 PM ��������������������
Welcome to Minitab, press F1 for help.
MTB > rand 100 c1;
SUBC> chis 3.
MTB > dotp c1
Dotplot: C1
.
: :.: ..: . ..
: :::::::.:: .:: ::.. .
:.::::::::::: :::: ::::.. : .. . .. . .
+---------+---------+---------+---------+---------+-------C1
0.0 2.5 5.0 7.5 10.0 12.5
MTB > desc c1
Descriptive Statistics: C1
Variable N Mean Median TrMean StDev SE Mean
C1 100 3.399 2.785 3.219 2.404 0.240
Variable Minimum Maximum Q1 Q3
C1 0.144 11.483 1.549 5.048
or, 100 samples of n=100 from the same chisquare distribution
MTB > rand 100 c1-c100;
SUBC> chis 3.
MTB > rmean c1-c100 c101
MTB > dotp c101
Dotplot: C101
.
::
:: .
::::. :
:.. . :::::.: ::: .
. : .:.:::.::.::::::::::::.: ... : . . .
-----+---------+---------+---------+---------+---------+-C101
2.40 2.70 3.00 3.30 3.60 3.90
hmmmm ... looks like the sampling distribution of the mean ... when the
population is shaped like a chisquare 3 distribution ... has that funny
looking normal like shape
MTB > desc c101
Descriptive Statistics: C101
Variable N Mean Median TrMean StDev SE Mean
C101 100 2.9789 2.9525 2.9733 0.2393 0.0239
Variable Minimum Maximum Q1 Q3
C101 2.3895 3.7689 2.8695 3.1187
MTB >
At 06:09 PM 9/20/01 -0300, Voltolini wrote:
>I am interested in the same programs and if possible,
>one that can generate normal, binomial, etc distributions !!!!
>
>Thanks for any suggestions !!!
>
>_____________________________________________________
>Prof. J. C. Voltolini
>Grupo de Estudos em Ecologia de Mamiferos - ECOMAM
>Universidade de Taubate - Depto. Biologia
>Praca Marcellino Monteiro 63, Bom Conselho,
>Taubate, SP - BRASIL. 12030-010
>
>TEL: 0XX12-2254165 (lab.), 2254277 (depto.)
>FAX: 0XX12-2322947
>E-Mail: [EMAIL PROTECTED]
>____________________________________________________
>----- Original Message -----
>From: @Home <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Thursday, September 20, 2001 2:50 PM
>Subject: Free program to generate random samples
>
>
> > Is there any downloadable freeware that can generate let's say 2000 random
> > samples of size n=100 from a population of 100 numbers.
> >
> > Is this conceivable? for excel etc.
> >
> >
> >
> >
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> >
>
>
>
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==============================================================
dennis roberts, penn state university
educational psychology, 8148632401
http://roberts.ed.psu.edu/users/droberts/drober~1.htm
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Instructions for joining and leaving this list and remarks about
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