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stranger297

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[求助] 测试人群数量不少于30人来源是什么?

各位专家,请教一下。基本所有的临床或者其他的测试,都要求有效人数不少于30人,有明确、详细的来源么?
也问过一些人,都说是统计学上的要求。。可还是一头雾水。
有哪位帮详细解释下么?
谢谢了
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