Martin Goldman wrote:
> Are you sure you have the correct question?
> Standard deviation is a measure of the spread around a mean for a
> value, and say, for example for a variable that has a normal
> distribution in a population e.g. serum potassium, two standard
> deviations of the mean will take in 95% of the values. The larger the
> number of values used to calculate the mean of a reading, usually,
> the smaller the standard deviation. To use two observations seems a
> little strange, and what is the object of this exercise?
>
Excel function =STDEV(A1:A2)
Gives result of 0.084852814 though how meaningful that I am not sure
--
Tim Walter
http://www.falklandsurgery.co.uk
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