List A: 0,5,10,15,20List B: 25,30,35,40,45Quantity A: The standard deviation o

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问题 List A: 0,5,10,15,20
List B: 25,30,35,40,45
Quantity A: The standard deviation of List A
Quantity B: The standard deviation of List B

选项 A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.

答案 C

解析 通过观察可知,List A中每个数都加上25之后,变为List B。于是利用定量推论(1),两组数据的标准差相同。
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