Edward Dreyer wrote:
>
> A colleague of mine - not a subscriber to this helpful list - asked me if
> it is possible for the standard deviation
> to be larger than the mean. If so, under what conditions?
Of course - for example, if you analyse mean-corrected data...
It can even happen with data that are strictly positive.
The log-normal distribution with sigma-squared>ln(2) is an example
that has standard deviation larger than the mean; e.g. with
sigma-squared=1,
the standard deviation will be about 130% of the mean.
Glen
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