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以县作为州级估计初级抽样单位的适用性AI 解读

Our purpose is to consider the efficiency of the county as the primary sampling unit for making state estimates of some socio-economic and agricultural characteristics of the farm population in North Carolina. The main emphasis is on the general purpose type of survey for the State as a whole—one in which both socio-economic and agricultural characteristics are to be estimated; the study is not directed at obtaining ‘best’ estimates for specialized items. Calculations herein…

以县为初级抽样单位进行州级估计的效率AI 解读

Our purpose is to consider the efficiency of the county as the primary sampling unit for making state estimates of some socio-economic and agricultural characteristics of the farm population in North Carolina. The main emphasis is on the general purpose type of survey for the State as a whole—one in which both socio-economic and agricultural characteristics are to be estimated; the study is not directed at obtaining ‘best’ estimates for specialized items. Calculations herein…

系统抽样及其与其他抽样设计的关系AI 解读

This paper presents a simple introduction to the theory of systematic sampling. Its relation to random sampling, stratified random sampling and cluster sampling is shown by means of a numerical example. Some advice is given on the circumstances under which systematic sampling may be advantageously used.