离散型随机变量的数学期望和方差ppt课件

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,14.4离散型随机变量的数学期望和方差,14.4离散型随机变量的数学期望和方差,1,C,C,2,A,A,3,1,2,3,P,0.4,0.2,0.4,B,123P0.40.20.4B,4,1,2,3,P,123P,5,离散型随机变量的数学期望和方差ppt课件,6,离散型随机变量的期望和方差的求法,离散型随机变量的期望和方差的求法,7,0,1,2,3,P,0123P,8,离散型随机变量的数学期望和方差ppt课件,9,离散型随机变量的数学期望和方差ppt课件,10,与期望和方差相关的问题,与期望和方差相关的问题,11,1,2,P,12P,12,离散型随机变量的数学期望和方差ppt课件,13,离散型随机变量的数学期望和方差ppt课件,14,0,1,2,3,4,P,01234P,15,离散型随机变量的数学期望和方差ppt课件,16,期望和方差的应用题,110,120,125,130,135,P,0.1,0.2,0.4,0.1,0.2,100,115,125,130,145,P,0.1,0.2,0.4,0.1,0.2,期望和方差的应用题110120125130135P0.10,17,离散型随机变量的数学期望和方差ppt课件,18,离散型随机变量的数学期望和方差ppt课件,19,X,1,5%,10%,P,0.8,0.2,X,2,2%,8%,12%,P,0.2,0.5,0.3,X15%10%P0.80.2X22%8%12%P0.20.5,20,Y,1,5,10,P,0.8,0.2,Y,2,2,8,12,P,0.2,0.5,0.3,Y1510P0.80.2Y22812P0.20.50.3,21,离散型随机变量的数学期望和方差ppt课件,22,离散型随机变量的数学期望和方差ppt课件,23,7,8,9,10,P,x,0.1,0.3,y,78910Px0.10.3y,24,离散型随机变量的数学期望和方差ppt课件,25,离散型随机变量的数学期望和方差ppt课件,26,离散型随机变量的数学期望和方差ppt课件,27,1,2,3,P,123P,28,离散型随机变量的数学期望和方差ppt课件,29,