概華论与款醒硫外「 1是日2Niso =P略2-rs过 =P{8≤x2(16)≤32} =P{x2(16)≤32)-P{x2(16)≤8} =[1-P{x2(16)≥321-[1-P{x2(16)≥8] =0.94         −  = 2 1 2 2 ( ) 2 1 2    n i Xi n 于是 P       =   −  = ( ) 32 1 8 1 6 1 2 2 i P Xi   {8 (16) 32} 2 = P    { (16) 32} { (16) 8} 2 2 = P   − P   [1 { (16) 32}] [1 { (16) 8}] 2 2 = − P   − − P   = 0.94;