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一、抽样检验的基本概念 抽样检验是通过检验一个样本来判断总体是否合格。为此必须制订一个抽检方案。对于混凝土强度来说,即是制订一个强度验收标准。下面先就一些概念加以说明。 1.批量与样本容量 需要检验的一批制品中所包含的单位制品的总数称为批量,又称母体或总体。但批量不宜过大,因为一旦出现样本质量不合
First, the basic concept of sampling inspection Sampling inspection is to test a sample to determine the overall eligibility. To this end, a sampling plan must be drawn up. For concrete strength, that is to develop a strength of acceptance criteria. Here are some concepts to explain. 1. Batch and sample size The total number of unit items contained in a batch of products that need to be tested is called the batch, also known as the mother or the total. But the batch should not be too large, because once the sample quality does not match