结果表明：用该方法校准的分压箱，比率误差为10-7量级。
The ratio error of the divider calibration with this method is at 10-7 order magnitude.
在目前几乎每一个民意测验项目中，对奥巴马的支持率与2008年投票支持他的比率误差仅在2- 3%。
And in nearly every demographic category, the percent that approve of Obama today is within two to three points of the percent who voted for him in 2008.
所有报告的样本误差比率包括了加权和抽样设计设计效应计算在内。
All reported margins of sampling error include the computed design effects for weighting and sample design.
给出了分子已知情况下比率估计量的偏差和均方误差以及均方误差的估计，并对两类比率估计量进行了比较。
In this paper, the bias of the ratio estimator and the estimate of mean square errors of this estimator with known numerator have been compared and discussed.
邻边比率法可以有效的消弱比例误差对测距的影响，使电磁波测距的精度得到提高。
The ratio between adjacent sides can effectively decrease affection of the proportional errors in distance measuring, and the accuracy may be increased.
讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。
We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.
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