The common frequency histogram method is not applicable to analyze the small sample data, because it is sensitive to the analysis parameters such as the starting point and the interval step.

在应用频率直方图法对小样本数据进行处理时，分析结果对直方图的起点、区间步长以及样本中的奇异数据十分敏感。

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Third, there is not an appropriate approach to deal with the non-stationary of small sample data.

第三，对于小样本数据的非平稳性，没有一个合适的处理方法。

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Where bills are higher, such as in the South West, they appear to be less keen - although the small sample sizes in these areas mean that the data needs to be treated with caution.

BBC: Getting fat on water