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. -------------------------------------------------------------------- E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk> Fax-to-email: +44 (0)870 094 0861 Date: 01-Aug-10 Time: 12:33:45 ------------------------------ XFMail ------------------------------ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.