(来学网)某资料服从正态分布,理论上在μ±σ范围内的变量值个数占全部例数的
  • A.
    (来学网)95%
  • B.
    (来学网)68.27%
  • C.
    (来学网)99%
  • D.
    (来学网)48.27%
  • E.
    (来学网)65%