有關B604的精選大全

已知隨機變量X~B(6,0.4),則當η=-2X+1時,D(η)=(  )A.-1.88      B.-2....
問題詳情:已知隨機變量X~B(6,0.4),則當η=-2X+1時,D(η)=()A.-1.88      B.-2.88        C.5.76         D.6.76【回答】C知識點:統計題型:選擇題...
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