statespace
SARIMAXResults.
cov_params_approx
(array) The variance / covariance matrix. Computed using the numerical Hessian approximated by complex step or finite differences methods.
statsmodels.tsa.statespace.sarimax.SARIMAXResults.cov_params
statsmodels.tsa.statespace.sarimax.SARIMAXResults.cov_params_oim