unknown variance meaning in English
未知方差
Examples
- 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 . 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 - Unlike the normal two stages estimate method ( the usual nonparametric weighted method combined with the least square estimate ) , considering the characteristics of this model , this paper uses the least square estimate combining with the usual nonparametric weighted method and defines the estimators and n2 for the unknown parameter , the unkown fuction g ( ) and the unknown variance of errors 2
与通常采用的两阶段估计方法即非参数权函数法结合最小二乘法不同，考虑到此模型本身的特性，本文采用最小二乘法结合一般非参数权函数估计方法，定义了未知待估参数和未知函数g ( ? )及误差方差~ 2的估计量( ? ) _ n ， ( ? ) _ n ( ? )和( - The basic idea of the estimate method is , firstly , based on the linear model yi = x ' i + ei , defining the least square estimator n of the linear model for the unkown parametric ; secondly , using the estimator n we " ve got to substitute for in the original semiparametric regression model yi = x ' i + g ( xi ) + ei and using the usual nonparametric weighted function method to define the estimator gn ( - ) for the unknown function g ( ) ; finally , defining the estimator 2 for the unknown variance of errors 2
其估计方法的基本思路是先基于线性模型y _ i = x _ i + e _ i ，定义未知待估参数的估计即此线性模型的最小二乘估计( ? ) _ n ；然后将所得估计( ? ) _ n代入原半参数回归模型中，用一般的非参数权函数方法定义未知函数g ( ? )的估计(