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标题: gwd3-4 [打印本页]

作者: founder 时间: 2005-4-20 06:36 标题: gwd3-4

In a demographic study, the population and total income of a certain region were estimated from other data, and both estimates had lower and upper limits. At the time of the estimates, was the per capita income for the region greater than $16,500?

(1) The lower limit for the estimate of the population was 330,000 people.

(2) The lower limit for the estimate of the total income was $5,500,000,000. (E)

why not C?

作者: fdgggd 时间: 2005-4-20 06:39

最低的平均收入出现在人口数的上限和总收入的下限，两个都是下限求不出来的。

作者: sammen 时间: 2005-4-20 22:12

就是给了2个下限，没用的啊。

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