试验方案设计中试验次数及其置信概率的计算

Calculation of Test Times and Confidence Probability in Test Project

文章主要论述了几种情况下试验次数的计算方法，给出了推导过程和计算实例，验证了所述计算方法的正确性；利用Mathcad数学工具软件进行样本容量计算，不需要查表，准确快捷便于应用。在一定样本容量下，本文借助Mathcad完成允许偏差与置信概率的互算，置信限与置信概率的互算。

The paper discusses principally the computational method of test times in several cases, and gives derivation process and calculation examples. It validates the correctness of the calculation method described in this paper. The paper calculates sample size with the aid of Mathcad without requiring table, which is accurate, fast and easy to use. The mutual calculation between the allowable error and confidence probability and between the confidence limit and confidence probability is made using Mathcad under the condition of the certain sample size.