Features and examples:
half_chi2()
poisson_log_likelihood_ideal_bkg()
poisson_observed_gaussian_background()
poisson_observed_poisson_background()
poisson_observed_poisson_background_xs()
regularized_log()
xlogy()
xlogy_one()
PoissonResiduals
PoissonResiduals.significance_one_side()
Significance
Significance.Noff
Significance.Non
Significance.alpha
Significance.expected
Significance.gaussian_background()
Significance.known_background()
Significance.li_and_ma()
Significance.li_and_ma_equivalent_for_gaussian_background()
Significance.net
aic()
bic()
dic()
sqrt_sum_of_squares()
waic()