组数据集 meaning in English

group data set

Then , with the concept of accumulated failure probability , the proposed approach combines the least ? quares method with bayes " theorem , takes advantage of the parameter estimation for single weibull distribution to each derived subgroup data set , and estimates the parameters of each subpopulation . the estimates given by this paper also satisfy the maximum likelihood equation . the mean time to failure and the reliability estimation of the mixed population are given
然后通过利用累积失效概率等概念，对每个导出的子组数据集联合运用最小二乘法、贝叶斯定理和对单一威布尔分布的参数估计法，从而得到每个子总体的满足极大似然原理的参数估计，给出了该混合总体平均寿命和可靠度的估计。