[R] Lognormal distribution - Range Factor

[(Ted Harding)]

On 01-Aug-10 10:59:03, Tims Corbett wrote:
> Hi, What does it mean to say Lognormal distribution with a mean of
> 1.03E-6 with a range factor of 100 ? How can I find the lognormal
> distribution paramters from this information?
> 
> Thanks, Tims

If you can, please say what is meant by "range factor". I have seen
it used to denote the ratio maximum/minimum for a sample, but it
might be intended to mean something else in the context of your
question.

If it does mean that, then the context is a sample of values, deemed
to be log-normally distributed, with (presumably) the sample mean
equal to 1.03E-6 (0.00000103) and max/min=100. However this would
be really inadequate information to determine what the parameters
of the log-normal distribution might be. At the very least one needs
also the sample size, and even then the determination would not be
reliable.

Ted.

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Date: 01-Aug-10                                       Time: 12:33:45
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