...
首页> 外文期刊>Journal of Agricultural, Biological, and Environmental Statistics >Bias Correction in Estimating Proportions by Pooled Testing
【24h】

Bias Correction in Estimating Proportions by Pooled Testing

机译:通过池测试估算比例的偏差校正

获取原文
获取原文并翻译 | 示例
           

摘要

In the estimation of proportions by pooled testing, the MLE is biased, and several methods of correcting the bias have been presented in previous studies. We propose a new estimator based on the bias correction method introduced by Firth (Biometrika 80: 27-38, 1993), which uses a modification of the score function, and we provide an easily computable, Newton-Raphson iterative formula for its computation. Our proposed estimator is almost unbiased across a range of problems, and superior to existing methods. We showthat for equal pool sizes the newestimator is equivalent to the estimator proposed by Burrows (Phytopathology 77: 363-365, 1987). The performance of our estimator is examined using pooled testing problems encountered in plant disease assessment and prevalence estimation of mosquito-borne viruses. Supplementary materials accompanying this paper appear online.
机译:在通过混合测试估计比例时,最大似然估计是有偏差的,在以前的研究中已经提出了几种纠正偏差的方法。基于Firth(Biometrika 80:27-381993)提出的偏差校正方法,我们提出了一种新的估计器,该估计器使用了对分数函数的修改,并为其计算提供了一个易于计算的牛顿-拉斐逊迭代公式。我们提出的估计器在一系列问题上几乎是无偏的,并且优于现有的方法。我们证明,对于相同的池大小,新估计量与Burrows(Phytopathology 77:363-3651987)提出的估计量是等价的。我们的估计器的性能是使用在植物疾病评估和蚊媒病毒流行率估计中遇到的混合测试问题来检验的。本文附带的补充材料出现在网上。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号