Message-ID: <BFC42567.1720%sdavis2@mail.nih.gov>
Date: 2005-12-13T12:14:47Z
From: Sean Davis
Subject: Question
In-Reply-To: <06D0025F-03D3-4473-82FB-05FEA811600E@gmail.com>
On 12/13/05 6:20 AM, "Davia Cox" <davia.cox at gmail.com> wrote:
> Hello,
>
> I have a problem that I am trying to solve and I am not sure how to
> do it in R.
>
> Suppose, that 16 numbers are choosen at random from 0 to 9, what's
> the probability that their average will be between 4 and 6. I typed
> the following code:
>
> set.seed(100)
> sample(0:9, 16, replace =TRUE)
> [1] 3 2 5 0 4 4 8 3 5 1 6 8 2 3 7 6
>
> Is what I got, however I realize the set.seed function locks in the
> number I get every time.
Just don't use set.seed() before every run (unless you want to always get
the same answers). Set.seed() is available to allow you to generate
reproducible results, so not using it means that you will get a different
set of random numbers every time you run your "sample" from above.
Sean