# [R] Very basic statistics in R

Jeff Newmiller jdnewmil at dcn.davis.CA.us
Fri May 3 15:26:05 CEST 2013

```I recommend you read the Introduction to R document that comes with R. Look for making vectors with the c() function, and using the mean() and sd() functions.

Note that this is not a homework help forum (read the Posting Guide mentioned at the bottom of every message). If this is not homework, you are going to need to do quite a bit of self study before you can ask questions clearly enough to get useful responses on this list. See

http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
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Sent from my phone. Please excuse my brevity.

Xavier Prudent <prudentxavier at gmail.com> wrote:

>Dear all,
>
>Very simple question, but apparently uneasy to solve in R:
>
>I have a sampling of a variable x: (3, 4. 5, 2, ...)
>
>I want to know:
> - the mean <x>                   -> mean(x)
> - the uncertainty on <x>       -> std.error(x) ? Or sd(x)?
> - the standard deviation of x  -> ?
> - the uncertainty on the standard deviation -> ?
>
>Anyone has an idea?
>