【摘要】 本文通过分析被测量可能值的概率分布给出扩展不确定度包含因子的确定方法,并对有效自由度的非整数值,其所对应的包含因子的取值进行了详细的研究。采用三次样条插值研究了有效自由度小于5的情况,得到较为准确的结果。更多还原

【Abstract】 The text gives the m ethods of calculating the coverage factor in the expanded u ncertainty by analyzing the probability distribution of the measured probable values, and systematically studies in detail the situationhowthecoverage factor is c alculatedin response tonon-integer of the effective degree of freedom. At the same time ,cubic spine interpolation to theeffective degreeoffreedomless than five, and getthe precise results.更多还原