Note:The data in this table is estimated by the Population Sample Survey.

注：本表为人口变动情况抽样调查推算数。

youdao

Note:Data in this table are estimated on the Population Sample Survey in 2008.

注：表中数据根据2008年人口抽样调查数据变动情况推算。

youdao

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。

youdao

When you get--this is Rituparna, counting the leaves on a tree-- you can estimate, from a sample, the population expected values.

如果你...像数叶子的睿都巴若那一样,只有部分样本的话,你可以来估计总体均值

耶鲁公开课 - 金融市场课程节选

We can define it in a couple of different ways depending on whether we're talking about sample mean or population mean.

我们有几种不同的方式去定义这个概念,取决于我们指的是,样本均值还是总体均值

耶鲁公开课 - 金融市场课程节选

And the other thing you can do is take self reports like the ones you're doing, hopefully do enough of them, and a random enough sample of the population, that you can extrapolate from that sample to the whole population, and try to estimate what people are eating in that way.

还有其他可以做的,比如大家正在做的这种个体调查,希望能把它做的充分些,如果有充足的随机样本,就可以从样本推断出,整个总体,从而推断哪类人有这样的饮食习惯

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The new results are the first from an ongoing study intended to assess mental health in a representative population sample, balanced for demographics and including people who returned home and those who remain dispersed around the country.

NPR: Mental Issues Surge, Suicide Rates Flat Post-Katrina

This sentiment was echoed in the report, which stated that only 1.3% of the companies had a female founder, 6.5% had a female CEO, and 20% had one or more female C-level executives, most commonly in sales and marketing roles - accounting for 27% of the total population sample.

FORBES: Do Women Make Startups More Successful? If So, How?

Although sampling can also lead to errors if, for instance, the characteristics of the sample group differ from those of the population from which the sample is drawn the errors will be smaller and can be measured more precisely.

ECONOMIST: Statistics