'Test assumption of normal-distributed errors using Jarque-Bera-style
omnibus Chi^2 test.
Parameters
signif : float
Test significance level.
Returns
result : NormalityTestResults
Notes
H0 (null) : data are generated by a Gaussian-distributed process'

def test_normality(self, signif=0.05):

    return test_normality(self, signif=signif)
