Distribution fitting test using Chi2ΒΆ

In this example we are going to perform a Chi2 goodness-of-fit test for an 1-d discrete distribution.

from __future__ import print_function
import openturns as ot
# Create data
distribution = ot.Poisson()
sample = distribution.getSample(30)
# Fit a Poisson distribution
distribution = ot.PoissonFactory().build(sample)
# Test the fitted distribution
result = ot.FittingTest.ChiSquared(sample, distribution, 0.01)
print('Conclusion=', result.getBinaryQualityMeasure(), 'P-value=', result.getPValue())
Conclusion= True P-value= 0.927513076795