| 分层抽样误差分析及其在渔业统计中的应用 |
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| 引用本文： | 袁兴伟,刘勇,程家骅.分层抽样误差分析及其在渔业统计中的应用[J].海洋渔业,2011,33(1):116-120. |
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| 作者姓名： | 袁兴伟 刘勇 程家骅 |
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| 作者单位： | 中国水产科学研究院东海水产研究所,农业部海洋与河口渔业重点开放实验室,上海,200090 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项基金，农业部专项 |
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| 摘 要： | 分层抽样是统计工作中最常采用的抽样方法之一.以全国海洋捕捞动态信息采集网络中南海区三省2009年10月采集的渔业信息为实际案例,分析研究了分层随机抽样和简单随机抽样方法的渔获量统计结果精度.结果表明:分层抽样方法的渔获量评估均值的方差明显小于简单随机抽样方法,后者的方差是前者的28.17倍;合理的分层和样本量分配,既可...
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| 关 键 词： | 分层抽样 随机抽样 方差 渔业统计 |
Error analysis on stratified sampling and its application in fishery statistics |
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| YUAN Xing-wei,LIU Yong,CHENG Jia-hua.Error analysis on stratified sampling and its application in fishery statistics[J].Marine Fisheries,2011,33(1):116-120. |
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| Authors: | YUAN Xing-wei LIU Yong CHENG Jia-hua |
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| Abstract: | Stratified sampling was one of the most common methods in statistics.The paper investigated the application effect of stratified sampling in fishery statistics with Dynamic Network Information Collection for National Marine Fishery.It also compared the accuracy in estimating the fishery catch of the South China Sea in October 2009 using two sampling methods: stratified sampling and simple random sampling.Results revealed that the variance of stratified sampling was quite smaller than that of simple random sampling.The latter could be 28.17 times more than the former.A reasonable stratification and sample assignment could not only maintain the accuracy of statistical results but also immensely cut the cost of statistical work.Therefore,stratified sampling is recommended to provide a reference for fishery statistics in the present condition. |
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| Keywords: | Stratified sampling random sampling variance fishery statistics |
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