The evaluation studied 166 of Rwanda's 401 primary care facilities over a 2-year period; its findings were based on random samples of 13 households living in local areas served by the clinics.
这项评估在两年的时间里研究了卢旺达401个初级服务机构中的166个机构。它的结论是根据13个随机抽样、居住在卫生所服务覆盖地区的当地家庭做出的。
The field of capture-recapture and removal is an important direction of mathematical statistics, which studies the estimation of the sizes of finite populations from incomplete random samples.
捕获再捕获与捕获移出研究是数理统计的一个重要方向，它研究如何利用随机样本估计有限群体的总体数目。
The research involves collecting data from two random samples.
该研究包括从两个随机的样本中收集数据。
Some retailers pull 3-4 random samples from each product group.
一些零售商随机从每批产品中抽取3-4 件样品。
Stratified sampling can reduce the sampling error associated with simple random samples.
分层抽样可以减少由简单随机抽样造成的抽样误差。
This article discusses the relations between randomness and the statistic law by analyzing three types of random samples.
本文通过对三类随机模型的分析，讨论了随机性与统计规律的关系。
The verifications shall be made by way of taking random samples from the declaration documents in the current month and past months.
核查采用随机抽查以往月份申报单和当月申报单的方式。
Two methods of generating random samples based on chaotic maps were studied to improve the resolution and Electronic Counter-Counter Measure (ECCM) of radar signals.
为了提高雷达信号的分辨率和抗干扰能力，分析了两种基于混沌映射生成随机抽样的方法。
The problem of using ordinary statistical methods basically for simple random samples in analyzing data from complex surveys for non simple random samples was discussed.
目前国内进行的调查大都采用复杂抽样方案，但在分析时却常常采用只适用于简单随机样本的一般方法。
The problem of using ordinary statistical methods basically for simple random samples in analyzing data from complex surveys for non simple random samples was discussed.
目前国内进行的调查大都采用复杂抽样方案，但在分析时却常常采用只适用于简单随机样本的一般方法。
应用推荐