n 个互相排斥事件发生的总概率是每个事件的发生概率之_______.(2分) 同时或依次发生的,互不相关(或相互统计独立)的事件发生的概率等于各个事件概率之_______.(2分) 平均值性质(请将答案用笔写在纸上,拍照后上传) 若f(u),g(u)是随机变量u的函数, =_____________; 若c为常数, =____________; 若随机变量 u 和随机变量 v 相互统计独立。又f(u)是u的某一函数,g(v)是 v的另一函数,则 =_____________.
【单选题】听力原文:M:Helen,how can I help you? W:Well, it's not about school,Dr.Hampton.I want to have a few people over for a dinner party to celebrate finishing my dissertation(学位论文).and we'd like to invite you e...
【单选题】听力原文:M: Dr. Wilson, can I tall to you for a minute? W: Sure, Fred, what is it? M: I'm worried about my grade in your English class. I really want an 'A', but... W: I see. Well, it might be hard for yo...