population-based sample的意思|示意

The study is based on a large population sample and took into account other possible factors, such as depression, season and levels of physical activity.

这项研究基于大群体样本，并且考察分析了其他可能影响的因素，如忧郁，季节和身体活动水平。

An array of inferential statistical procedures (methodologies for estimating population parameters based upon sample data) could be fruitfully exploited, but at present are not being applied.

有许多 推论统计步骤（根据样本数据估计总体参数的方法）可以被充分利用，但目前却没有应用它们。

"We continue to support studies to provide clarity on the use of our drug in this population, " she adds. "But it is really hard to reach a conclusion based on the small sample sizes in this study.

“我们会继续向研究活动提供支持以澄清我们的药物用于这个群体的后果，”她补充道，“但是想通过这样一个小样本量的研究获得确切结论确实比较困难。”

The population diameter structure can well be described by using nonparametric kernel method based on the sample data without assuming the population diameter distribution.

应用非参数核密度估计方法，可以由样本直径结构很好地描述总体直径结构，而无需假定总体的直径分布。

The calculation formulas of sample size based on the error limitation are given for estimation of population mean.

对于样本均值估计总体均值，给出了基于误差限制的样本容量的计算式。