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【Daily Topic】【Engineering Version 20170503】

2017-05-03View Original

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Participation reward: 2 Wealth. Correct reward: 6 wealth. Multiple-choice question: Samples are taken at regular intervals or over a certain distance; the first sample is selected randomly. This data collection method is ( ). A. Simple random sampling B. Systematic sampling C. Secondary sampling D. Stratified sampling. B

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