虽然许多地区都有人口普查的统计数字，但可靠性参差不齐，也没有提供语言结构及语言社会用途方面的信息。
While census Numbers exist for many areas, they vary in reliability and provide no information about the structure of languages or their use in society.
数据泄露加剧了对中国经济统计数据可靠性的质疑所带来的问题。
Data leaks compound problems caused by doubts about the reliability of China's economic statistics.
置信区间的意义很直观，因为它们的大小表示可靠性：窄的区间表示统计数据比较精确，宽的区间表示统计数据不太确定。
Confidence intervals are intuitive because their size indicates reliability: short intervals indicate that the statistic is precisely known, while wide intervals indicate uncertainty.
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