[FEATURE] Having hist functionalities such as a chisq/ndo, KS test etc.

[garvitaa]

Describe the problem, if any, that your feature request is related to

I would like to compare the shapes of two hists created using coffea by using KS test and chisq/ndof test.
But the scipy implementation available is not

Describe the feature you'd like

It would be helpful to have something similar to:

KolmogorovTest(hist1, hist2)

with options for using Under/Overflow, comparison of normalization etc, and similarly

Chi2Test(hist1, hist2)

Describe alternatives, if any, you've considered
Tried the scipy.stat.ks_2samp and scipy.stat.chisquare, but they do not work out of the box for histograms.

[ikrommyd]

Hi @henryiii, I think I would like to take a shot at this. I'm thinking of methods of hist.Hist objects to do one sample tests of the histogram vs a known distribution and methods to do two sample tests vs other hist.Hist objects.