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词汇 random sample
释义 ˌrandom ˈsample

noun

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() a number of people or things taken from a larger group using a process in which each person or thing has an equal chance of being chosen随机样本Questionnaires were sent to a random sample of 5 000 households.问卷寄给了随机抽取的 5 000 个家庭。 ˌrandom ˈsampling

noun

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