未知方差 meaning in English

unknown variance

Application of statistical . estimation of a mean unknown variance
统计学应用.平均值的计算未知方差
Application of statistical . estimation of the difference of two means known variances
统计学应用.两组平均值的差的计算未知方差
Application of statistical . comparaison of a mean with a given value unknown variance
统计学应用.给定值与平均值的比较未知方差
Application of statistical . comparison of the difference of two means with a given value unknown but equal variances
统计学应用.给定值与两组平均值差的比较相等的未知方差
For the general multivariate linear model , in this paper , the necessary and sufficient condition for admissibility of the linear estimator for sx in the class of linear estimator under different criteria is gained
摘要对于一般未知方差多元线性模型，讨论了共同均值矩阵参数的可估函数sx的线性估计在线性估计类中的可容许性问题，证明了在本文所给的不同优良准则下可容许性是等价的，并得到了它们的充要条件。