Terms containing within sample variance

Subject	English	Chinese
econ.	If the purchaser finds that the delivered goods are at variance with the sample, he should notify the seller within 15 days after the arrival of the goods	如买方发现运来的货物与样品有差异，应在货到后15天内通知卖方
tech.	variance within primary sample units	初级抽样单位内的方差
busin.	within sample variance	样本内方差