Returns the confidence interval of the fitted parameters.
alpha : float, optional
The alpha level for the confidence interval. ie., The default alpha = .05 returns a 95% confidence interval.
cols : array-like, optional
cols specifies which confidence intervals to return
Notes
The confidence interval is based on Student’s t-distribution.
statsmodels.sandbox.regression.gmm.IVRegressionResults.condition_number
statsmodels.sandbox.regression.gmm.IVRegressionResults.cov_HC0
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