random sample是什么意思 random sample怎么读
random sample的英文翻译是什么意思，词典释义与在线翻译
Noun:- a sample in which every element in the population has an equal chance of being selected
- a sample grabbed at random
random sample的用法和样例
用作名词 (n.)
- The opinion poll was based on a random sample of adults.
这次民意测验结果是在对成年人的随机抽样调查基础上得出来的。
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