random sample

常见例句

Instead of getting a random sample, your poll will reflect the activist groups' organizational skills and energy level.
这样一来，由于无法获得随机的抽样，投票只能反映各激进组织的组织技巧和精力。
They are not a random sample, so those numbers do not represent reality whether or not those numbers serve our interests.
而这些案例不是随机样本，所以那些数据无法反映现实，无论那些数据是否对我们有利。
I am against processing those case studies into numbers, because those numbers would only be valid if the case studies we have are a random sample.
我反对将那些案例研究处理成数字，因为只有我们所掌握的这些案例是随机样本时，那些数字才有效。

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随机抽样,来研究冥想？
哈佛公开课 - 幸福课课程节选
And I say if you took a random sample of the Americans: "When you woke up in the middle of the night" and said: "What does the America stand for?"
我觉得如果给美国人做个抽样调查：,半夜醒来的时候“,被问到，美国人主张什么“
普林斯顿公开课 - 国际座谈会课程节选
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

We estimate that about 5 to 8 percent of a random sample of children have ADD.
NPR: Excerpt: 'Delivered from Distraction'
The monthly Consumer Confidence Survey, based on a probability-design random sample, is conducted for The Conference Board by Nielsen.
FORBES: Consumer Confidence Index Gets a Holiday Boost
The National Federation of Independent Business (NFIB) conducts monthly surveys of a random sample of its 350, 000 members.
FORBES: Is The Jobs Market Really Improving?