附件2 样本量字码 sample size code
根据中心极限定律以及t分布,95%置信区间的范围基本等于:sample mean
即样本量(sample size)
sheet created by olga schors)面试易考点:sample size calculation
=vlookup(a3,e2:f14,2,false) 这个sample是返回的size的值.
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