Normal Distribution: Finding probabilities 正态分布曲线下面积的几何意义 Probability is the area under the curve!累积概率 P(c≤X≤d)=? f(X X cdNormal Distribution: Finding Probabilities 正态分布曲线下面积的几何意义 Probability is the area under the curve ! 累积概率 c d X f(X) P (c  X  d )= ?