Hi Dimitri, I think we agree on the two different concepts (sd of the parameters, and confidence interval), and we also agree that the terminology in CM should be precise. For the moment, the formula for guessParametersErrors is sqrt(chi^2 / dof * cov[i][i]) this is I believe the formula for the standard deviation on the parameters.
As far as I understood sqrt(cov[i][i]) is the half-width of the 68% confidence interval. I hope I got it correctly! Now, do you call sigma the first or the second expression? I would think the first expression should be called sigma, since it is truly a standard deviation. But you are more used than I am to this kind of statistical analyses. I really want to carry out a new monte-carlo simulation with a small number of dofs, so that the difference between the two fomulae will be greater than observed at the moment. Sébastien --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
