(B) dfrac (sqrt {n)(overline (X)-mu )}(S)sim t(n-1).-|||-(C) dfrac (sqrt {n)(overline (X)-mu )}(S)sim t(n). (D) dfrac (sqrt {n)(overline (X)-mu )}(S)sim t(n-1).A、AB、BC、CD、D


  • A、A
  • B、B
  • C、C
  • D、D

参考答案与解析：

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