Do I go out to Harvard yard and take a random sample of sophomores to study meditation?

是不是可以在哈佛大二学生里抽样来研究冥想?

The research involves collecting data from two random samples.

【data】该项研究需要从两个样本里收集资料。

So what you do is you survey a random sample of that population and then you can calculate statistics on that sample that hopefully can estimate the population as a whole.

所以你要做是调查该人口样本，然后你可以计算该样本统计数据，希望可以估计整个人口。

If we took a random sample of a million people who majored in math, the subset who are portrait artists might be relatively small.

如果我们抽取 100 万个数学专业人，其中是肖像画家子集可能相对较小。

Our recently published study answered this question by tracking a large national random sample of Americans over a critical time period when bodies change from teenage shape into adult form and when people build their identities.

我们最近发表研究回答了这个问题，方法是在身体从青少体型转变为成人体型以及人们建立身份关键时期跟踪大量全抽样人。

We are confident that there is a 99% chance that a random x, a random sample mean, is within-- and let's figure out this value right here using a calculator.

我们确信 x（ 样本均值） 有 99%会在 - 让我们在这里使用计算器计算出这个值。

The most significant would be for random sampling because, of course, in order to take a random sample, after all, you need random numbers.

最重要是抽样， 因为当然，为了抽样，毕竟你需要数。

We chose a random sample of teenagers from Jiangsu province from a typical public middle school, and we considered this group to be representative of teenagers in urban China.

我们选取江苏省某典型公立中学青少作为样本，认为这一群体可以代表中城市青少。

You actually want to take a random sample.

你实际上想抽样。

These are not people who have sought treatment for depression but just a random community sample.

这些不是寻求抑郁症治疗人，而只是社区样本。

These were cross-sectional surveys, self-report, with no non-athlete control groups, and they weren't random samples of athletes.

这些是横断面调查, 自我报告, 没有非运动员对照组, 也不是运动员样本。

And they're saying, if I were to measure it of a random sample of high school seniors, what would it look like?

他们说，如果我对高中毕业生样本进行测量， 它会是什么样子？

Take random samples from different locations.

2. 取样 & 检测（Sampling & Testing）从不同地点取样。

Out of a random sample of drivers, 21% had been in an accident in the previous year.

【sample】在抽样调查驾驶员中，有 21% 曾在上一发生过事故。

This is usually done by a " random sample" over the telephone.

这通常是通过电话“抽样”来完成。

And actually that works pretty well but what makes it especially hard for the pollsters is that it's hard to get a random sample.

实际上效果很好，但对民意测验者来说特别困难是，很难获得样本。

An advisor to the U.S. Centers for Disease Control says blood donors are not a random sample of the population.

疾病防治中心一名顾问表示，献血者不是人群中抽取样本。

That is all third-year accounting students, for instance, a simple random sample involves choosing a number of participants from a group of similar people.

这些都是会计学三级学生，例如，一个简单样本是从一组相似人中选择一些参与者。

It's plausibly a random sample from this population.

这是一个真正取样。

If you just surveyed, you know, like a random sample of people passing by on the street and you asked them, is PayPal a bank?

如果你刚刚进行调查，你知道，就像抽样在街上路过人一样，你问他们，PayPal 是一家银行吗？