Evaluation of the comparative method of two large sample means. 两个大样本均数比较方法的评价。
Sample size is often calculated for significance test of difference between two sample means in design of study. 在研究设计中,常要为对两样本均数的差别作统计学检验而计算所需的样本含量。
Objective : To evaluate the comparative method of two sample means of normal distribution offers some information for statistical analysis in practice. 目的:对正态分布两样本均数比较常用的方法进行评价,为实际工作中统计方法的合理选择提供参考和依据。
Diffusion method, was suggested as a sample introduction means in HPCE. 本文提出了用扩散作为高效毛细管电泳的进样方法。
A method for making the standard iron spectra and processing the sample by means of a CCD industry camera and a small prism spectrograph is introduced. 介绍了借助CCD工业摄象机,使用小型棱镜摄谱仪拍摄光谱及在微型计算机上制作标准铁谱和处理光谱的方法。