many thanks
--- On Sun, 5/24/09, Martin Weiss <[email protected]> wrote:
> From: Martin Weiss <[email protected]>
> Subject: st: Re: dataset generation
> To: [email protected]
> Date: Sunday, May 24, 2009, 1:25 PM
> <>
>
> Nikolaos might also like to acquaint himself with the
> -drawnorm- command:
>
> ***
> drop _all
> drawnorm x y, n(20) means(15 18) /*
> */corr(1, 0 \ 0, 1) sds(4 6) /*
> */cstorage(full) seed(41322)
> su
> ***
>
> Two problems are apparent in his request:
>
> The small sample size makes deviations from his desired
> values for the mean
> and standard deviation very likely. If he is willing to
> increase the sample
> size, this problem will (almost) vanish.
>
> The reason people recommend the normal distribution for
> this kind of problem
> is that you can change the mean and sd to the values you
> like. Note that for
> some of the random number functions in -help
> random_number_functions-, the
> mean and variance are functions of each other. In the case
> of the poisson,
> they are identical, making it harder to make them diverge
> in the way
> Nikolaos wants them to....
>
>
> HTH
> Martin
> _______________________
> ----- Original Message -----
> From: "Nikolaos Pandis" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, May 24, 2009 9:15 AM
> Subject: st: dataset generation
>
>
> > Hi,
> >
> > I would like to ask for help in the following:
> >
> > I would like to generate a small dataset with 2
> columns:
> > column 1: observations 20, mean= 15, sd= 4
> > column 2: observations 20, mean=18, sd=6
> >
> > How would I do that?
> >
> > Many thanks in advance.
> >
> > Nick
> >
> >
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/help.cgi?search
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
