比率法确定铁路家属人数的多阶段抽样调查估计

A Multistage Sampling Survey for Quantitatively Determining the Family Members of The Railway Staff and Workers

目的：在南京铁路分局辖区开展铁路职工及家属人口资料的抽样调查，以便获取铁路糸统传染病监测对象的准确人口资料。方法：应用按比例抽样原理，建立三级抽样框，抽样比为１５％的问卷抽样调查。结果：职工与家属人数比率为０．７５１８，标准差为０．０１１，并得出职工及家庭的性别比及年龄构成比。结论：本次调查搜集的人口资料，对开展铁路糸统传染病的流行病学分析有重要价值。

bjective:A multistage sampling survey of population data within the staff and workers of Nanjing Regional Railway Administration was done to obtain an exact population data for monitoring infectious diseases.Method:According to the principle of proportional allocation,a three-stage sampling survey was set up.A questionnaire was used with a sampling ratio of 15%.Result:The ratio of railway staff and workers to their family members was found to be 0.7518±0.011.A sex- and age-constituent ratio of the staff and workers to their family members was calculated.Conclusion:The population data collected in this study is valuable to the epidemiologic analysis of infections diseases.