【多选题】设X与Y相互独立服从相同分布,X~B(1, 0.5),【图片】,则以下选项正确的是
【多选题】设X与Y相互独立服从相同分布,X~B(1, 0.6),【图片】则以下选项正确的是
C.
E ( X Z )> E ( X ) E ( Z ).
【单选题】男,18岁,3天前淋雨受凉后出现寒战、发热、咳嗽。查体:体温39. 0°C,急性热病容,右肺呼吸音减弱,语音共振增强。胸部X线片示右下肺大片状模糊阴影。该患者最可能的诊断是
【单选题】lactose is also called
【单选题】— May I _______ your sport shoes? — Sure, but you couldn't _______ them to others. [ ]
【判断题】设【图片】相互独立,服从相同的分布,【图片】,则根据大数定律,当【图片】时,【图片】依概率收敛到2.
【判断题】设随机变量【图片】与【图片】相互独立且服从相同的分布,并且方差存在,则【图片】与【图片】一定不相关。
【单选题】A bank is the place ______they lend you an umbrella in fair weather and ask for ask for it back when it Begins to rain.
【单选题】I can't _____ money to you; you can _____ money from your parents. [ ]