标准正态分布P=$(0.37)-$(-0.37) =$(0.37)-(1-$(0.37)) =$(0.37)+$(0.37)-1 =0.644 3*2-1 =0.2886 约等于0.289欢迎采纳~~
P=$(0.37)-$(-0.37) =$(0.37)-(1-$(0.37)) =$(0.37)+$(0.37)-1 =0.644 3*2-1 =0.2886 约等于0.289
正态分布呀!p(-0.37查表知Φ(0.37)=0.6443算得p(-0.37
是大学高等数学的问题?