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Average Per-Pupil Expenditures for the I0 Percent of School Districts State X That Had the Highest Expenditures (Group H) Compared to the 10 Percent of School Districts That had the Lowest Expenditures (Group L)
From the 1979-80 school year to the 1989-90 school year, the percent increase in the difference between the average per-pupil expenditures for the Group H districts and that for the Group L districts was closest to which of the following?
做题笔记
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参考解析
当前版本由 354261qil 更新于2024-07-04 17:06:01 感谢由 354261qil 对此题目的解答所做出的贡献。
79~80学年两个区相差600；89~90学年两个区相差2000。百分比增幅为(2000-600)/600≈2
网友解析
我有更好的解析
当前版本由 俺要逃离山沟沟 更新于2024-08-14 12:25:55 感谢由 俺要逃离山沟沟 对此题目的解答所做出的贡献。
(4700−2700)−(1700−1100)(1700−1100) =2.333
所以大概是200%
题目讨论
(如果对题目有任何的疑惑，欢迎在这里提出来，大家会帮你解答的哦~)
243740e
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俺要逃离山沟沟
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还有我真的不太懂上面那个10%是有什么意义，图跟上面那段直接把我整懵了
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10%就是那一组的样本是总体数量的10%，对做题没有影响
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我知道，我的意思是，这个图加上面那一大段字就非常干扰人
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311173z
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华西歼G机
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