The panel study involved a random sample of 895 households from over 50 000 enrolled in a cash-for-work programme between September and December 2007 and 921 similar control households.
我们从2007年9月和12月登记在现金薪酬项目的50,000多个家庭中抽取了895个家庭作为随机样本，还选择了921个类似的对照家庭，然后对它们开展了小组研究。
The study is of opinion that the uncertainty contribution of RON measurement system is, by using this technique, consisted of quality control (QC) sample and in-statistical RON results.
研究表明，采用该技术来评估RON检测系统的不确定度，其贡献量分别是由质量控制（QC）样品和受控RON测试结果两部分合成。
Results Actual use of the method for estimating sample size and the relationship between effect factors and sample size were illustrated by a example of case control family study of liver cancer.
结果用实例说明了病例对照家系设计中样本含量估计方法的应用与影响因素和样本含量的关系。
应用推荐