(来学网)标准正态分布曲线下区间(-∞,+1.96)所对应的面积是
  • A.
    (来学网)99.50%
  • B.
    (来学网)97.50%
  • C.
    (来学网)95%
  • D.
    (来学网)99%
  • E.
    (来学网)90%