Married Americans are happier, ceteris paribus, by approximately one quarter of a happiness point on the 1-3 scale.
其他条件不变，已婚的美国人会更幸福，在1-3规模上约高四分之一的幸福点。
2
The scale of the errors uncovered-over a quarter of the names on the voters' list were fictitious or repeated-seems too large for it to be simply an instance of incompetence.