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From: Omics on 20 Apr 2010 14:24
Hi, Anybody can tell me which function or formula should I use in excel to
calculate the median standard deviation? Thanks a lot.

Omics
From: Luke M on 20 Apr 2010 14:39
That is two seperate statistical functions!

Median:
=MEDIAN(...)

Standard Deviation:
=STDEV(...)

Check out the help file on statistical functions for more details.

--
Best Regards,

Luke M
"Omics" <Omics(a)discussions.microsoft.com> wrote in message
news:B37D0AA1-89D7-4BEE-8560-69C24DA3F101(a)microsoft.com...
> Hi, Anybody can tell me which function or formula should I use in excel to
> calculate the median standard deviation? Thanks a lot.
>
> Omics


From: dlw on 20 Apr 2010 14:56
let's say your standard deviations were in cells a1 to a5, the median would be:
=median(a1:a5)

"Omics" wrote:

> Hi, Anybody can tell me which function or formula should I use in excel to
> calculate the median standard deviation? Thanks a lot.
>
> Omics
From: Omics on 20 Apr 2010 15:07
Thanks, a lot. This will give me the median of the data. But how can I
calculate the median standard deviation?

Omics

"dlw" wrote:

> let's say your standard deviations were in cells a1 to a5, the median would be:
> =median(a1:a5)
>
> "Omics" wrote:
>
> > Hi, Anybody can tell me which function or formula should I use in excel to
> > calculate the median standard deviation? Thanks a lot.
> >
> > Omics
From: Joe User on 20 Apr 2010 15:13
"Omics" wrote:
> Hi, Anybody can tell me which function or formula
> should I use in excel to calculate the median
> standard deviation?

You will need to be more careful with your terminology if you want a
meaningful answer.

First, are you referring to the median or the mean (arithmetic average)?

The median is the middle value of the data. The mean is the average of the
data. For example, if the data are 1, 4 and 5, 4 is the median, whereas the
mean is about 3.33.

Note that the standard deviation (emphasis on "standard") is defined as a
deviation from the mean, not the median.

I 'spose that you could substitute the median for the mean in the standard
deviation formula. (See the STDEVP help page.) But then it would not be
"standard" ;-). And the usefulness of such a measure is unclear.

On the other hand, the median deviation is defined as the average of the
absolute deviations from the median.

To my knowledge, there is no Excel formula for that. You can compute it
with the following array formula [*]:

=SUM(ABS(A2:A100-A1:A99))/100

[*] Enter an array formula by pressing ctrl+shift+Enter instead of just
Enter. In the Formula Bar, you will see curly braces around the entire
formula, viz. {=formula}. You cannot type the curly braces yourself; that is
just Excel's way of denoting an array formula. If you make a mistake, select
the cell, press F2, edit as needed, then press ctrl+shift-Enter.

Lastly, if you mean that you have a set of standard deviations, and you want
to calculate their median, you could use =MEDIAN(A1:A10). But again, the
usefulness of such a measure is unclear.
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