The relative standard expanded uncertainty of measured results by using said method was 4.4%.
计算得到该方法测量结果的相对标准扩展不确定度为4.4%。
By taking the volume measurement of vertical metallic tanks as an example, the evaluation of standard uncertainty and the calculation of expanded uncertainty are described in detail.
本文结合立式金属罐的容量测量实例，详述了标准不确定度的计算及扩展不确定度的获得过程。
But if we are not sure about whether the effective freedom degree is more than 10, it is doubtful that selecting expanded uncertainty as twice as combined standard uncertainty.
但如果不知道有效自由度是否大于10，而直接取扩展不确定度等于两倍的合成标准不确定度是存在疑虑的。
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