标准偏差和平均值的标准偏差探讨

Discussion on Standard Deviation and Standard Deviation of the Mean Value

在等精度测量、服从正态分布的前提下,主要针对标准偏差和平均值的标准偏差的意义进行较深入的探讨,以解决人们对其模糊认识和在化学检测领域的实际应用等问题。主要涉及的具体问题是:标准偏差和平均值的标准偏差的具体意义;计算公式中符号的规范化使用;标准物质定值中,标准偏差与不确定度A类评定方法的关系;在中国合格评定国家认可委员会(CNAS)组织的实验室现场评审工作中,化学分析检测结果不确定度A类评定方法的正确应用。

On the basis of equal accuracy of measurement and normal distribution, this paper discusses mainly the significance of the standard deviation and standard deviation of average value, in order to solve the problems of the fuzzy recognition and actual application in the chemical detection field. The concrete problems concerned mainly are: the specific meaning of standard deviation and standard deviation of the mean value; standardized using of the symbols in the calculation formula; in the fixed value of reference materials, the relationship between standard deviation and uncertainty A type evaluation method; in laboratory field appraise work organized by the China National Accreditation Committee( CNAS), the correct application of uncertainty A type evaluation method to chemical analysis examined results.