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# Re: st: RE: RE: A math question

 From David Hoaglin To statalist@hsphsun2.harvard.edu Subject Re: st: RE: RE: A math question Date Fri, 21 Dec 2012 10:52:36 -0500

```The median is a function of a distribution.  You did not specify the
distribution of x.  If you explained the context for your question, we
might be able to shed better light.

David Hoaglin

On Fri, Dec 21, 2012 at 10:42 AM, CJ Lan <CJ@jupiter.fl.us> wrote:
> Al,
>
> I think the "median" is a function, just like the "mean" is a function, not just a number.
>
> BTW, the derivative of abs(x^3) should be 3*x*abs(x) because the derivative can be derived as
>  abs(x^3)/(x^3)*(3*x^2) = 3*abs(x)*x^2/x = 3*x*abs(x).
>
> I wish others could shed a light too?  Thx.
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