def stats(self):
        """
        Return statistics calculated overall samples of all utterances in the corpus.

        Returns:
            DataStats: A DataStats object containing statistics overall samples in the corpus.
        """

        per_utt_stats = self.stats_per_utterance()
        return stats.DataStats.concatenate(per_utt_stats.values())
Return statistics calculated overall samples of all utterances in the corpus.

        Returns:
            DataStats: A DataStats object containing statistics overall samples in the corpus.