On Mon, May 5, 2014 at 10:51 AM, John Darrington <[email protected]> wrote: > On Mon, May 05, 2014 at 08:09:16AM -0700, Ben Pfaff wrote: > I'm sure there is an error in our implementation. NaN is coming from > the square root of a negative number, as you said. > > I made another mistake below. PSPP actually calculates ASE0 correctly > for asymmetric lambda (lambda divided by ASE0 is what's displayed as > "Approx. T", which matches that calculated by SPSS for asymmetric > lambda). It's ASE1, displayed as "Asymp. Std. Error", that PSPP gets > wrong. > > Ahh. I was calculating ASE0. > > ASE1 like you say seems wierd and results in an imaginary number. I can only > imagine > that this is a mistake in the SPSS documentation. Unfortunately I haven't > been able > to find any other references on how to calculate this value. > > Another issue: if we have T, we should be able to calculate the significance. > We just > need to know the degrees of freedom. I wonder how these are calculated? > > Unfortunately the litereature on these values seems to be scarce.
https://v8doc.sas.com/sashtml/stat/chap28/sect20.htm has a different formula, but I don't understand how to interpret r_i|l_i = l. _______________________________________________ pspp-dev mailing list [email protected] https://lists.gnu.org/mailman/listinfo/pspp-dev
