[R] Question

[Uwe Ligges]

Davia Cox 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.

Yes, that's what set.seed is intended to do... otherwise don't use 
set.seed (and make your work unreproducible).


> My question is in order to run a true random sample, 

We have to disappoint you: Your computer cannot generate "true random 
samples".


 > wouldn't I have
> to use the runif function? And then deliminate the sample to show the  

No, if you want integers, the sample above fits perfectly well.


> numbers that lie between 4 and 6? If that's the case, how do I do that?

Is this a homework question?

Uwe Ligges


> 
> Davia S. Cox
> 517-575-8031 cell
> davia.cox at gmail.com
> 
> "Human potential, though not always apparent, is there waiting to be  
> discovered and invited forth." -William W. Purkey
> 
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