Simulate from the Normal distribution using instance values

        Parameters
        ----------
        size : int
            How many simulations to perform

        Returns
        ----------
        np.ndarray of Normal random variable

def draw_variable_local(self, size): 
        """ Simulate from the Normal distribution using instance values

        Parameters
        ----------
        size : int
            How many simulations to perform

        Returns
        ----------
        np.ndarray of Normal random variable
        """
        return ss.norm.rvs(loc=self.mu0, scale=self.sigma0, size=size)