(来学网)标准正态曲线下,横轴上从-1.96到1.96的面积是
  • A.
    (来学网)99.0%
  • B.
    (来学网)97.5%
  • C.
    (来学网)95.0%
  • D.
    (来学网)90.0%
  • E.
    (来学网)50.0%