The research measures improvement features with five aspects - data collection, sample source, sampling measure, sample capacity and feet back rate.

国际商业研究方法的完善性主要体现在数据收集方法、样本来源、抽样方法、样本容量和反馈率5个主要方面。

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Sample capacity and error;

样本容量和误差的问题。

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Sample capacity and error;

样本容量和误差的问题。

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