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[watermark]
x1,x2,x3,x4是相互独立的高斯随机变量,且
y1 = x1 + x2 + x3 + x4
y2 = x1 + x2 + x3 - x4
y3 = x1 + x2 - x3 + x4
y4 = x1 + x2 - x3 - x4
y5 = x1 - x2 + x3 + x4
y6 = x1 - x2 + x3 - x4
y7 = x1 - x2 - x3 + x4
y8 = x1 - x2 - x3 - x4
那么y=max{y1,y2,y3,y4,y5,y6,y7,y8}服从什么分布呢,近似的也可以[/watermark][br][br]-=-=-=-=- 以下内容由 yangzaixiu 在 时添加 -=-=-=-=-
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