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The standard deviation of the numbers 45,64,83, and 53
The standard deviation of the numbers 55,81,47, and 62
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当前版本由 笑笑笑笑笑 更新于2024-08-16 10:26:36 感谢由 笑笑笑笑笑 对此题目的解答所做出的贡献。
将两组数据按大小顺序排好后为：
45、53、64、83
47、55、62、81
A组数据中45,53分别比B组数据的47,55小2， 而A组数据中64, 83则分别比B组数据中的62， 81大2， 因此B组数据比A组数据更加集中，B的标准方差更小，选A。
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方差越小，数据越集中，B比A集中说明B的方程更小
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