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How big is the data sample selected in general papers?
The most suitable sample size is about 300~500.

If a questionnaire survey is involved in the graduation thesis, there must be a sample for investigation, and the sample size should not be too small. The sample size is too small to explain the problem, so the basic sample size should be controlled at around 300~500. Only in this way can it be the support of the data in the paper and can it be passed in the evaluation process.