bias-corrected bootstrap method bias-corrected bootstrap method(偏差校正自助法)是一种统计学方法,用于估计统计量的偏差并进行校正。该方法主要用于通过自助抽样的方式来重复抽样数据集,并通过计算抽样数据集的统计量来估计原始数据集的统计量。本文将逐步解释bias-corrected bootstrap method的基本概念、步骤和应用。
一、什么是自助法(bootstrap method): 自助法是一种通过基于已有样本数据重复抽样来估计统计量的方法。其基本思想是利用已有样本数据来模拟总体分布,并通过多次抽样计算得到统计量的分布。这种方法的主要优点是不需要对总体的分布进行假设,且可以通过构建置信区间来进行推断。 二、偏差校正: 在自助法中,得到的统计量的...
The bootstrap has become a popular method for exploring model (structure) uncertainty. Our experiments with artificial and real-world data demonstrate that the graphs learned from bootstrap samples can be severely biased towards too complex graphical models. Accounting for this bias is hence essential...
each bootstrap sample D (b) often contains multiple identical datapoints, which is a typical property of discrete data. When the given data D is in factcontinuous (with a vanishing probability of two data points being identical), e.g., asin gene-expression data, the bootstrap procedure intro...
A bootstrap approach for assessing the uncertainty of outcome probabilities when using a scoring system pThe bias-corrected and accelerated bootstrap method was used to estimate the 95% confidence intervals of outcome probabilities associated with a scoring ... G Cevenini,P Barbini - 《Bmc Medical...
In this article, we proposed five estimators of the shape parameter for a scalar skew normal model, either by bias correction method or by solving a modified score equation. Simulation studies show that except bootstrap estimator, the proposed estimators have smaller bias compared to those ...
Confidence intervalsCoverageMonte CarloSensitivityBootstrapBranching ratioRolke–LopezWe discuss a method for correcting the bias in the limits for small signals... RAM López - 《Nuclear Instruments & Methods in Physics Research》 被引量: 5发表: 2003年 加载更多来源...
Automatic spectral density estimation for random fields on a lattice via bootstrap We consider the nonparametric estimation of spectral densities for second-order stationary random fields on a d-dimensional lattice. We discuss some drawba... JM Vidal-Sanz - 《Test》 被引量: 12发表: 2009年 加载...
All previously formulated equations are not bias corrected, where the efficiency scores of DEA are subject to sampling variation of frontier (Tsolas,2011). The core idea behind the bootstrapping is to estimate the efficiency scores based on multiple sampling process (Simar & Wilson,1998). To av...
We use the bias-corrected bootstrap based on two alternative bias-correction methods: the bootstrap and an analytic formula based on asymptotic expansion. We also propose a new stationarity-correction method, based on stable spectral factorization, as an alternative to Kilian's method exclusively ...