def conf_int(self, alpha=.05):
        """
        Returns the confidence intervals of the marginal effects

        Parameters
        ----------
        alpha : float
            Number between 0 and 1. The confidence intervals have the
            probability 1-alpha.

        Returns
        -------
        conf_int : ndarray
            An array with lower, upper confidence intervals for the marginal
            effects.
        """
        _check_at_is_all(self.margeff_options)
        me_se = self.margeff_se
        q = stats.norm.ppf(1 - 2 / alpha)
        lower = self.margeff - q * me_se
        upper = self.margeff + q * me_se
        return np.asarray(lzip(lower, upper))
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/genmod/generalized_estimating_equations.py/GEEMargins.conf_int/swapped operands of `/`