抽样

Methods To collect data by cluster sampling and analyze data by polychotomous Logistic regression.

方法采用整群抽样调查搜集资料,采用多类回归析筛选影响因素。

It would be easy to misinterpret results from such a small sample.

从这样小的一份抽样出发出曲解的结论。

Via examining, have 40 kinds eligibly, sampling percent of pass is 58.8% , among them 10 kinds belong to the product with quality serious problem.

经检验，合格的有40种，抽样合格率为58.8%，中有10种属质量问题严重的产品。

Superpopulation model is a bridge between survey sampling and other branches of statistics.It is helpful to study sampling theory with the tool of superpopulation models.

摘要超总体模型是抽样理论与统计学支联系的桥梁，借助超总体模型研究抽样理论是一个有前途的方法。

Indicate epidemiology investigation , confirm on the grounds of international sampling investigation, major part in the cancerogenic patient who has a smoke is a passive smoker.

流行病学调查表明，据国际性的抽样调查证实，吸烟致癌患者中的大部是被动吸烟者。