I am a MINITAB user and don't claim to have used it with the sample sizes
your talking about. BUT, I would venture to say that it has the best
reliability analysis tools of any general statistics package out there. Only
Weibull ++ and (maybe) WeibullSmith are better. By "reliability analysis"
I'm
one can possibly download mtb for $26 for 6 months ... at
http://www.-e-academy.com/minitab
i am not sure everyone qualifies but, it is worth a try AND is the full
release 13
if you played your cards right ... you can download for FREE for 30 days
and then EXTEND the "lease" after that ...