def display_outOfBound(self, data, lowBound, highBound):
        """ Select data that is out of bounds. 
        
        Parameters
        ----------
        data        : pd.DataFrame()
            Input dataframe.
        lowBound    : float
            Lower bound for dataframe.
        highBound   : float
            Higher bound for dataframe.

        Returns
        -------
        pd.DataFrame()
            Dataframe containing data that is out of bounds.    

        """

        data = data[self._find_outOfBound(data, lowBound, highBound).any(axis=1)]
        return data