Haiti is one of the of poorest country in the world, 80% of the population average earn less than two US dollars per person.

海地是世界上最贫穷的国家之一，80%的人口人均日生活费不足两美元。

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The maximum likelihood estimator for population average treatment effect is proved to be consistent, unbiased and asymptotically normal.

并且证明了在正态分布的假设下，该总体平均因果效应的极大似然估计是相合无偏且渐近正态的。

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Low average population densities are characteristics of most underdeveloped countries.

平均人口密度低是大多数不发达国家的特点。

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We could have gone on and studied the average at-risk population for decades and centuries.

我们本可以继续研究几百年来的,平均受危人群。

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This is very important,which is why I am doing it: "If we want to know how fast a human being can run, then it is no use to average out the speed of a "good sample" of the population; it is far better to collect Olympic gold medal winners and see how well they can do.

这话非常重要，是我作这个研究的原因：,“如果想知道人类最快能跑多快，那从好的样本中测出平均数是“,没用的;,而应该收集田径类奥运冠军的信息,看他们能跑多快。

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As a result, larger individuals in that population are fitter and the population average changes.

ECONOMIST: A master of evolution takes a last long look at Darwin

He added that most people would have at least one of the genes but it was the combination of a few that would increase a person's risk above the population average.

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Thanks to the simultaneous growth in the total world population, the average population of a country has not declined greatly: it is down from around 32m in 1946 to 29m today.

ECONOMIST: LITTLE COUNTRIES: Small but perfectly formed | The