问题标题:
设X-N(1.5,4)计算P{x2.5}设X-N(1.5,4)计算P{x<=3.5},P{X>2.5}一道关于概率的问题
问题描述:
设X-N(1.5,4)计算P{x2.5}
设X-N(1.5,4)计算P{x<=3.5},P{X>2.5}一道关于概率的问题
黄生学回答:
k(2x2_2/3x3)k=3/8(2)P{1<x<3}==0.8413P{x<=3.5}=P{x<=1}=0.8413P{x>2.5}==0.3085P{X>2.5}=1-P{x<=2.5}=1-P{x<=0.5}=1-0.6915=0.3085
点击显示
数学推荐
热门数学推荐