It might be a stupid question but I really need to make things clear…
Can someone explain me what are the error values returned by a fitting procedure…
The reason is: I’ve fitted a set of data with root and another program. Both of them returned me quite the same value for the parameter I was looking for.
But the errors are completly different. If ones look nice I have to undestand why is the difference so big.
Thanks a lot !
PS: Unfortunately the Minuit package description don’t fully answer my question