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- 数学PS -

Set contains the elements . Which of the following sets has a smaller standard deviation than set ?

I.

II.

III.

  • A

    (I) only

  • B

    (II) only

  • C

    (III) only

  • D

    (I) and (III)

  • E

    None of them

显示答案
正确答案: E

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