The recommended sample size for a systematic random sampling is 500 children.
系统随机抽样的推荐样本大小是500名儿童。
During the course of cluster sample verification, systematic sampling and stratified sampling "s accuracy are prior to simple random sampling" s.
群样本检验中，系统抽样群样本检验和分层随机抽样群样本检验的效果优于简单随机抽样群样本检验。
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