GMAT 考满分题库

- 数学PS -
Which of the following options has the standard deviation greater than that of the sequence {- 20, - 10,0,10,20}?
  • A20,22,24,26,28
  • B-13,-10,-7,-4,-1
  • C0,4,8,12,16
  • D20, 25, 40, 55, 60
  • E-30,-25,-20,-15,-10
显示答案
正确答案: D

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