假设检验在汽车排放实验室比对中的应用研究

Research on the Application of Hypothesis Test on Vehicle Emission Laboratory Comparison

为了在进行汽车排放实验室比对时获得可观、准确的评价结果,以轻型汽车排放实验室比对的数据为例,利用数理统计中的假设检验方法,实现了实验室比对评价。将该方法与通常采用的Z比分数、百分差和相对标准差等评价方法进行对比,结果表明:该方法所得实验室比对评价结论与其他方法结论的趋势基本相同;该评价方法利用置信概率和置信区间,结合标准差进行实验室比对结果分析,所得结论能够反映比对结果的真实情况,可定位实验室的技术水平状态。

In order to obtain considerable and accurate evaluation results in the vehicle emission laboratory comparison,this paper,taking the light vehicle emission laboratory comparison data as an example,uses the hypothesis test method in mathematical statistics,and makes laboratory comparison evaluation.This method is compared with evaluation methods,i.e.Z-score,percentage difference and relative standards deviation.The results show that the trend of the laboratory comparison evaluation conclusion obtained by this method is basically the same as that of other methods;the evaluation method uses the confidence probability and confidence interval,combined with the standards deviation to analyze the laboratory comparison results.The conclusion can reflect the real situation of the comparison results and locate the technical level of the laboratory.