A kind of probability sample in which a set interval is applied to a list often population to identity elements included in the sample (e.g., picking every 10th name).
A kind of probability sample in which a set interval is applied to a list often population to identity elements included in the sample (e.g., picking every 10th name).
一种概率抽样.以一定的间隔来从人口名单中抽取所需的样本(如:每隔10个人抽取一次).