PS on a matter of terminology, what you are calling the 'sd' (i.e. 'standard deviation') is not the true standard deviation, it's only an estimate since it's obtained from the data. Such an estimate of the standard deviation used to be called (you guessed it!) the 'estimated standard deviation' (or ESD). International convention now has it that the ESD is given a name, the 'standard uncertainty' (SU) - see here: http://physics.nist.gov/cgi-bin/cuu/Info/Constants/definitions.html . Some people insist on mixing their metaphors and call it the 'estimated standard uncertainty' (ESU - i.e. equating 'uncertainty' with 'deviation'), but that would be the 'estimated estimated standard deviation' (EESD??) - how many levels of estimation are needed?
-- Ian On Mon, Nov 22, 2010 at 6:33 PM, Bryan Lepore <bryanlep...@gmail.com> wrote: > [ scala 3.3.16 ] > > in scala's "final table", there's "Mean((I)/sd(I))". i could be wrong, > but the error of this measurement seems to me to exist, considering > the uncertainty of sigma = 1 / sqrt( 2 (N-1) ) ... but its not clear > where the logfile has the values of I or sigma and N that correspond > to Mean((I)/sd(I)) so i can calculate it myself. > > or, am i overlooking a table of perhaps percent data vs. I/sigma in > scala, or something else... > > -Bryan >
