Objective Discussing sample size estimation method and effect factors for case control family design.
目的探讨病例对照家系设计中样本含量的估算方法及影响因素。
Objective: To introduce the methods for sample size estimation based on width of confidence interval.
目的：介绍基于置信区间宽度的样本含量估计方法。
The calculation formulas of sample size based on the error limitation are given for estimation of population mean.
对于样本均值估计总体均值，给出了基于误差限制的样本容量的计算式。
The sender tracks the packet loss status according to the algorithm-loss rate estimation based on variable frame size and switches two audio sample files in accordance with packet loss status.
传送端根据以变动框架长度为基础之 遗失率估算法，来估算目前网路上封包遗失的状况，并以此作为切换高低音质档案的依据。
The sender tracks the packet loss status according to the algorithm-loss rate estimation based on variable frame size and switches two audio sample files in accordance with packet loss status.
传送端根据以变动框架长度为基础之 遗失率估算法，来估算目前网路上封包遗失的状况，并以此作为切换高低音质档案的依据。
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