sampling at random的意思|示意

Methods: Adopting the methods of whole group sampling at random, study on 306 children aged 4-6 of 14 kindergartens in Jing an District of Shanghai.

方法：采用随机整群抽样方法，在上海市静安区抽取14所幼儿园306名4 ~ 6岁儿童进行了研究。

The colognes and perfumes tested were a random sampling of products the average consumer might find at a department or drugstore.

古龙水和香水的检测是在任意一个顾客的产品或者在一个企业或者一个化妆品店随机进行的化学测试。

The program consists of a statistical random sampling designed to detect a 1% incidence of violations at a confidence level of 95%.

该计划包括一个统计学上的随机采样，目的是在95%的置信程度上查出1%的违规几率。