It's plausibly a random sample from this population.

这是一个真机取样。

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

是不是可以哈佛大二学生里机抽样来研究冥想?

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

美国疾病防治中心一名顾问表示，献血者不是人群中机抽取样本。

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

这通常是通过电话“机抽样”来完成。

The research involves collecting data from two random samples.

【data】该项研究需要从两个机样本里收集资料。

Take random samples from different locations.

2. 取样 & 测（Sampling & Testing）从不同地点机取样。

You actually want to take a random sample.

你实际上想机抽样。

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，而只是机社区样本。

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

【sample】机抽样调查驾驶员中，有 21% 曾上一年发生过事故。

So if you take a random sample, and that's exactly what we did when we found these 7 samples.

所以如果你机抽取样本，这是我们这 7 个样本时所做。

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, 也不是运动员机样本。

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.

这些都是会计学三年级学生，例如，一个简单机样本是从一组相似人中选择一些参与者。

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

如果我们机抽取 100 万个数学专业人，其中是肖像画家子集可能相对较小。

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，很难获得机样本。

When we took these 7 samples and took their mean, that mean can be viewed as a random sample from the sampling distribution.

当我们获取这 7 个样本并取其均值时，该均值可以看作是来自抽样分布机样本。

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机样本进行测量， 它会是什么样子？

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

最重要是机抽样， 因为当然，为了机抽样，毕竟你需要机数。

DIFFERENTIAL IMPACT Because people differ in many ways, those who are unemployed are not likely to be a random sample of the labor force.

不同影响 由于人们很多方面存差异，失业者不可能是劳动力中机样本。

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，就像机抽样街上路过人一样，你问他们，PayPal 是一家银行吗？

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.

我们机选取江苏省某典型公立中学青少年作为样本，认为这一群体可以代表中国城市青少年。