The districts back in 1913 represented the population distribution of the U.S. at that time.

913年划分的区域代表着,当时美国人口的分布。

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These plots are extracted from these two regions and represent trials in which you're about to buy a product or you are about not to buy a product.

这些图是两个区域的切片,分别代表着受试者是否会,购买商品的不同试验。

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