A 1 B 3 C <img src="https://www.beizhujiaoyu.com/uploads/202208/161223778138081.png" width="19" height="52" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/161223778512751.png" width="19" height="52" />

A Cov(X，Y)=0 B D(X+y)=D(X)+D(Y) C D(XY)=D(X)D(Y) D E(XY)=E(X)E(Y)

A AB B A<img src="https://www.beizhujiaoyu.com/uploads/202208/16122398326251.png" width="20" height="35" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/161223983672281.png" width="34" height="35" /> D A∪B

A 0．01 B 0．05 C 0．1 D 0．4

A <img src="https://www.beizhujiaoyu.com/uploads/202208/161224072579681.png" width="51" height="32" />  B <img src="https://www.beizhujiaoyu.com/uploads/202208/161224073042951.png" width="120" height="32" />  C <img src="https://www.beizhujiaoyu.com/uploads/202208/161224074996421.png" width="120" height="32" />  D <img src="https://www.beizhujiaoyu.com/uploads/202208/161224075961071.png" width="120" height="32" /> 

A E(2X-1)=2np B D(2X+1)=4np(1-p)+1 C E(2X+1)=4np+1 D D(2X-1)=4np(1-p)

A 4 B 5 C <img src="https://www.beizhujiaoyu.com/uploads/202208/161224143692521.png" width="20" height="52" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/161224144360031.png" width="19" height="52" />

A 1 B 0 C <img src="https://www.beizhujiaoyu.com/uploads/202208/161224146058201.png" width="49" height="55" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/161224146583051.png" width="20" height="52" />