... 样本间变异数 between-sample variance 样本间变异 between-sample variation 层间变异数 between-stratum variance ...
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variation between the sample means 样本均值间的变异
between-sample variation
点之间变化
以上为机器翻译结果，长、整句建议使用 人工翻译 。
On the basis of statistical theory, the distribution probability of full graded concrete strength and the relation between the sample size and coefficient of variation are introduced.
运用统计学理论给出了全级配混凝土试件强度的概型分布，导出了试验样本容量与变异系数之间的关系式。
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