(来学网)正态分布曲线下,横轴上从均数μ到μ+l.96σ的面积为()
  • A.
    (来学网)97.50%
  • B.
    (来学网)95%
  • C.
    (来学网)48.80%
  • D.
    (来学网)47.50%
  • E.
    (来学网)45%