Back in 1896, the original Dow Jones Industrial Average was an unscientific selection of 12 American companies, weighted by the nominal level of their share prices rather than their market value.

1896年，道琼斯工业平均指数的计算最初只选择12家美国公司，按照名义股价而非市值进行加权，这很不科学。

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These models can range from $200 up to $1500 and provide the broadest range of selection for the average person.

这些模型的范围可以从200美元到1500美元，并提供最广泛的选择一般人。

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The notion of random selection is extended to random harmonious average of random transition probability for nonehomgenous Markov chains by using a new method of differentiation on net.

利用网微分方法将随机选择的概念，推广到有限马氏链随机转移概率随机调和平均的情形。

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My criteria for selection included funds that held bonds with an average rating of investment grade and at least 5 years of returns.

FORBES: Pick Your Muni Funds Carefully

Among a selection of 100 top brand pages on Facebook, those using paid media reach an audience that is on average 5.3 times larger than organic audience alone, and 5.4 times greater than the total audience of top brand pages using no paid media with a similarly sized fan base.

FORBES: Facebook: Yes, Our Ads Work, Chapter 16

But like many market experiments, these suffer from a selection bias problem: Many of the people who want to buy or use these devices are already more environmentally conscious than average.

FORBES: Paying Attention To Energy Use