Fit Probability

ROOT
1

Hey all,

I cannot understand this fit->GetProb() from https://root.cern.ch/doc/master/TF1_8cxx_source.html#l01692
What do I determine how good my fit is? When I tried it on a Breit Wigner distribution, I got a zero.

Can somebody tell me?

Thanks!

2

Hi,

this will get you started https://en.wikipedia.org/wiki/Chi-squared_distribution#Table_of_.CF.872_values_vs_p-values
Any Statistics book will help you in learning further, e.g., among the others, https://cds.cern.ch/record/1019859/holdings

Cheers,
D

3

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