若随机变量ξ服从正态分布ξ~N(3,2),,则随机变量η的期望是(  )A.0B.C.D.

若随机变量ξ服从正态分布ξ~N(3,2),,则随机变量η的期望是(  )A.0B.C.D.

题型:武昌区模拟难度:来源:
若随机变量ξ服从正态分布ξ~N(3,2),,则随机变量η的期望是(  )
答案
举一反三
A.0B.data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAtCAYAAABbAsDYAAABF0lEQVRYhe3VLUsEURjF8QezwbIIA7Lnf5Jlm7BVLBpMGsVvYDdZTHa/wWJRbAZFEJuKmCyC0WQ3i5YRlmGdxZ17FZc5cGBe4PldhsvciDZt2iSL7Z7trW/aawxImgOegaNRtb2RAlkDzhsPqguwB+znRs5sr+dGXoH5bEBRFAu2X4af2f74ahLE9iZwOgxUwRTIgaTd3MhVt9tdqXmfBHnrdDqz2QBJi8BTNiAiAtgGBtmAEjkEduqAiUBJy5KOS+ROUr86tNpJVn8r6ab8Kb5HxMyPh9RF0ipwIakPPNp+SApERACXtpfK63vgJDkyHQGum3YsUm7dRs3/Kdr8apKf6aOAuvv/g4xDW+DvgWy7q/GZPjX5BAsLg85UWhzQAAAAAElFTkSuQmCCC.data:image/png;base64,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D.
机变量ξ服从正态分布N(2,22),则P(2<ξ<3)可以被表示为(   )
题型:成都一模难度:| 查看答案
题型:许昌二模难度:| 查看答案
题型:不详难度:| 查看答案
题型:不详难度:| 查看答案
A.1-P(ξ<1)B.C.P(0<ξ<1)D.+P(ξ<1)
已知ξ-N(0,σ2),且P(-2≤ξ≤0)=0.4,则P(ξ>2)=______.
已知随机变量X服从正态分布N(3,1),若P(1<X<5)=a,P(0<X<6)=b,则P(0<X≤1)=______.
设ξ~N(0,1),且P(|ξ|<b)=a(0<a<1,b>0),则P(ξ≥b)的值是______(用a表示).
设随机变量ξ~N(μ,δ2),且data:image/png;base64,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,则P(0<ξ<1)的值为(  )
题型:不详难度:| 查看答案
最新试题
热门考点

超级试练试题库

© 2017-2019 超级试练试题库,All Rights Reserved.

A.data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAkCAYAAAB8DZEQAAAAZ0lEQVRIiWNgGAWjAB0oKSn9p6nhMEwzS5AtG7Vk1BLqG46OaWbZKBgBQFFR8TkxGKaerBSooKAgQQxG1oNuME2S+qglJFtCUdFDjGaKXE5MMFBceNIlrAlZOmrBwFtAl0w2WsfDAACnmlzjJXWCrwAAAABJRU5ErkJggg==B.1-pC.1-2pD.data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAkCAYAAADo6zjiAAAAdUlEQVRYhe2VQQrAMAgE84we1f//q89oT0IIPUgXstLugLeAk4TVMYToTERctMZZFIFZRAIS+KfAHMMWcRRiC+5+VirPPyUl0/IqRWZ2VKp6obXp9ihLoIUANMrRPQDdGH0+eInR/2+FKqDmLZrThwg9BZ/mBuF/ZUHX4rmpAAAAAElFTkSuQmCC